adding cancellation token

remove default option: IsUpset = true in update methods, to avoid une…

CoreIntegrationTests/CRUDObjectIdTests.cs

@@ -0,0 +1,22 @@
+using CoreIntegrationTests.Infrastructure;
+using MongoDB.Bson;
+
+namespace CoreIntegrationTests
+{
+    public class CoreObjectIdTestDocument : TestDoc<ObjectId>
+    {
+    }
+
+    public class CRUDObjectIdTests : MongoDbTKeyDocumentTestBase<CoreObjectIdTestDocument, ObjectId>
+    {
+        public CRUDObjectIdTests(MongoDbTestFixture<CoreObjectIdTestDocument, ObjectId> fixture) : base(fixture)
+        {
+
+        }
+
+        public override string GetClassName()
+        {
+            return "CRUDObjectIdTests";
+        }
+    }
+}

CoreIntegrationTests/CRUDPartitionedCollectionNameAttributeTests.cs

@@ -5,7 +5,7 @@ using System;
 
 namespace CoreIntegrationTests
 {
-    [CollectionName("CoreTestingCollectionNameAttributePartitionedTKey")]
+    [CollectionName("CoreTestingCNameAttrPart")]
     public class CorePartitionedCollectionNameDoc : TestDoc, IPartitionedDocument
     {
         public CorePartitionedCollectionNameDoc()

CoreIntegrationTests/CRUDPartitionedTests.cs

@@ -18,7 +18,6 @@ namespace CoreIntegrationTests
     {
         public CRUDPartitionedTests(MongoDbTestFixture<CorePartitionedDoc, Guid> fixture) : base(fixture)
         {
-
         }
 
         public override string GetClassName()

CoreIntegrationTests/CRUDTKeyPartitionedCollectionNameAttributeTests.cs

@@ -1,11 +1,14 @@
 using CoreIntegrationTests.Infrastructure;
+using MongoDB.Bson;
 using MongoDbGenericRepository.Attributes;
 using MongoDbGenericRepository.Models;
 using System;
 
 namespace CoreIntegrationTests
 {
-    [CollectionName("TestingCollectionNameAttributePartitionedTKey")]
+    #region Guid Type 
+
+    [CollectionName("TestingCNameAttrPartTKey")]
     public class CoreTKeyPartitionedCollectionNameDoc : TestDoc<Guid>, IPartitionedDocument
     {
         public CoreTKeyPartitionedCollectionNameDoc()
@@ -28,4 +31,35 @@ namespace CoreIntegrationTests
             return "CoreCRUDTKeyPartitionedCollectionNameAttributeTests";
         }
     }
+
+    #endregion Guid Type
+
+
+    #region ObjectId Type
+
+    [CollectionName("TestingCNameAttrPartObjectId")]
+    public class CoreObjectIdPartitionedCollectionNameDoc : TestDoc<ObjectId>, IPartitionedDocument
+    {
+        public CoreObjectIdPartitionedCollectionNameDoc()
+        {
+            PartitionKey = "CoreTestPartitionKeyObjectId";
+        }
+
+        public string PartitionKey { get; set; }
+    }
+
+    public class CRUDObjectIdPartitionedCollectionNameAttributeTests : MongoDbTKeyDocumentTestBase<CoreObjectIdPartitionedCollectionNameDoc, ObjectId>
+    {
+        public CRUDObjectIdPartitionedCollectionNameAttributeTests(MongoDbTestFixture<CoreObjectIdPartitionedCollectionNameDoc, ObjectId> fixture) : base(fixture)
+        {
+
+        }
+
+        public override string GetClassName()
+        {
+            return "CoreCRUDTKeyPartitionedCollectionNameAttributeTests";
+        }
+    }
+
+    #endregion ObjectId Type
 }

CoreIntegrationTests/CRUDTests.cs

@@ -11,7 +11,6 @@ namespace CoreIntegrationTests
     {
         public CRUDTests(MongoDbTestFixture<CoreTestDocument, Guid> fixture) : base(fixture)
         {
-
         }
 
         public override string GetClassName()

CoreIntegrationTests/CoreIntegrationTests.csproj

@@ -1,21 +1,26 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>netcoreapp2.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.Identity" Version="2.0.1" />
-    <PackageReference Include="Microsoft.Extensions.Identity.Stores" Version="2.0.1" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.5.0" />
-    <PackageReference Include="MongoDB.Driver" Version="2.5.0" />
-    <PackageReference Include="MongoDbGenericRepository" Version="1.3.5" />
-    <PackageReference Include="xunit" Version="2.3.1" />
-    <PackageReference Include="xunit.runner.console" Version="2.3.1" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />
+    <PackageReference Include="Microsoft.AspNetCore.Identity" Version="2.1.2" />
+    <PackageReference Include="Microsoft.Extensions.Identity.Stores" Version="2.1.2" />
+    <PackageReference Include="MongoDB.Driver" Version="2.12.0" />
+    <PackageReference Include="xunit" Version="2.4.1" />
+    <PackageReference Include="xunit.runner.console" Version="2.4.1">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
     <DotNetCliToolReference Include="dotnet-xunit" Version="2.3.0-beta4-build3742" />
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\MongoDbGenericRepository\MongoDbGenericRepository.csproj" />
+  </ItemGroup>
+
   <ItemGroup>
     <Reference Include="System.Configuration">
       <HintPath>..\..\..\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.6.1\System.Configuration.dll</HintPath>

CoreIntegrationTests/IdentityUserTests.cs

@@ -6,7 +6,7 @@ using Xunit;
 using Microsoft.AspNetCore.Identity;
 using System.Threading.Tasks;
 
-namespace CoreCoreIntegrationTests
+namespace CoreIntegrationTests
 {
     public class MongoIdentityUser<TKey> : IdentityUser<TKey>, IDocument<TKey>
         where TKey : IEquatable<TKey>

CoreIntegrationTests/Infrastructure/MongoDbConfig.cs

@@ -1,6 +1,4 @@
-using CoreCoreIntegrationTests;
-using MongoDB.Bson.Serialization;
-using MongoDB.Bson.Serialization.Conventions;
+using MongoDB.Bson.Serialization.Conventions;
 using System.Threading;
 
 namespace CoreIntegrationTests.Infrastructure

CoreIntegrationTests/Infrastructure/MongoDbDocumentTestBase.Main.cs

@@ -1,15 +1,18 @@
-using MongoDbGenericRepository.Models;
+using MongoDbGenericRepository;
+using MongoDbGenericRepository.Models;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
+using System.Linq.Expressions;
 using System.Runtime.CompilerServices;
+using System.Threading;
 using System.Threading.Tasks;
 using Xunit;
 
 namespace CoreIntegrationTests.Infrastructure
 {
-    public abstract class MongoDbDocumentTestBase<T> :
+    public abstract partial class MongoDbDocumentTestBase<T> :
         IClassFixture<MongoDbTestFixture<T, Guid>>
         where T : TestDoc, new()
     {
@@ -28,7 +31,7 @@ namespace CoreIntegrationTests.Infrastructure
             _fixture.PartitionKey = PartitionKey;
             TestClassName = GetClassName();
             MongoDbConfig.EnsureConfigured();
-            SUT = TestRepository.Instance;
+            SUT = TestTKeyRepository<Guid>.Instance;
         }
 
         protected T CreateTestDocument()
@@ -61,7 +64,7 @@ namespace CoreIntegrationTests.Infrastructure
         /// <summary>
         /// SUT: System Under Test
         /// </summary>
-        protected static ITestRepository SUT { get; set; }
+        protected static ITestRepository<Guid> SUT { get; set; }
 
         #region Add
 
@@ -69,7 +72,7 @@ namespace CoreIntegrationTests.Infrastructure
         public void AddOne()
         {
             // Arrange
-            var document = new T();
+            var document = CreateTestDocument();
             // Act
             SUT.AddOne<T>(document);
             // Assert
@@ -82,7 +85,7 @@ namespace CoreIntegrationTests.Infrastructure
         public async Task AddOneAsync()
         {
             // Arrange
-            var document = new T();
+            var document = CreateTestDocument();
             // Act
             await SUT.AddOneAsync<T>(document);
             // Assert
@@ -95,7 +98,7 @@ namespace CoreIntegrationTests.Infrastructure
         public void AddMany()
         {
             // Arrange
-            var documents = new List<T> { new T(), new T() };
+            var documents = CreateTestDocuments(2);
             // Act
             SUT.AddMany<T>(documents);
             // Assert
@@ -106,11 +109,37 @@ namespace CoreIntegrationTests.Infrastructure
             Assert.True(2 == count, GetTestName());
         }
 
+        [Fact]
+        public void AddManyWithDifferentPartitionKey()
+        {
+            // only run this test for tests on documents with partition key
+            if (!string.IsNullOrEmpty(PartitionKey))
+            {
+                // Arrange
+                var documents = CreateTestDocuments(4);
+                if (documents.Any(e => e is IPartitionedDocument))
+                {
+                    var secondPartitionKey = $"{PartitionKey}-2";
+                    ((IPartitionedDocument)documents[2]).PartitionKey = secondPartitionKey;
+                    ((IPartitionedDocument)documents[3]).PartitionKey = secondPartitionKey;
+                    // Act
+                    SUT.AddMany<T>(documents);
+                    // Assert
+                    long count = SUT.Count<T>(e => e.Id.Equals(documents[0].Id) || e.Id.Equals(documents[1].Id), PartitionKey);
+                    long secondPartitionCount = SUT.Count<T>(e => e.Id.Equals(documents[2].Id) || e.Id.Equals(documents[3].Id), secondPartitionKey);
+                    // Cleanup second partition
+                    SUT.DeleteMany<T>(e => e.Id.Equals(documents[2].Id) || e.Id.Equals(documents[3].Id), secondPartitionKey);
+                    Assert.True(2 == count, GetTestName());
+                    Assert.True(2 == secondPartitionCount, GetTestName());
+                }
+            }
+        }
+
         [Fact]
         public async Task AddManyAsync()
         {
             // Arrange
-            var documents = new List<T> { new T(), new T() };
+            var documents = CreateTestDocuments(2);
             // Act
             await SUT.AddManyAsync<T>(documents);
             // Assert
@@ -121,6 +150,31 @@ namespace CoreIntegrationTests.Infrastructure
             Assert.True(2 == count, GetTestName());
         }
 
+        [Fact]
+        public async Task AddManyAsyncWithDifferentPartitionKey()
+        {
+            // only run this test for tests on documents with partition key
+            if (!string.IsNullOrEmpty(PartitionKey))
+            {
+                // Arrange
+                var documents = CreateTestDocuments(4);
+                if (documents.Any(e => e is IPartitionedDocument))
+                {
+                    var secondPartitionKey = $"{PartitionKey}-2";
+                    ((IPartitionedDocument)documents[2]).PartitionKey = secondPartitionKey;
+                    ((IPartitionedDocument)documents[3]).PartitionKey = secondPartitionKey;
+                    // Act
+                    await SUT.AddManyAsync<T>(documents);
+                    // Assert
+                    long count = SUT.Count<T>(e => e.Id.Equals(documents[0].Id) || e.Id.Equals(documents[1].Id), PartitionKey);
+                    long secondPartitionCount = SUT.Count<T>(e => e.Id.Equals(documents[2].Id) || e.Id.Equals(documents[3].Id), secondPartitionKey);
+                    // Cleanup second partition
+                    SUT.DeleteMany<T>(e => e.Id.Equals(documents[2].Id) || e.Id.Equals(documents[3].Id), secondPartitionKey);
+                    Assert.True(2 == count, GetTestName());
+                    Assert.True(2 == secondPartitionCount, GetTestName());
+                }
+            }
+        }
 
         #endregion Add
 
@@ -182,7 +236,7 @@ namespace CoreIntegrationTests.Infrastructure
             SUT.AddOne<T>(document);
             // Act
             var cursor = SUT.GetCursor<T>(x => x.Id.Equals(document.Id), PartitionKey);
-            var count = cursor.Count();
+            var count = cursor.CountDocuments();
             // Assert
             Assert.True(1 == count, GetTestName());
         }
@@ -293,160 +347,6 @@ namespace CoreIntegrationTests.Infrastructure
 
         #endregion Read
 
-        #region Update
-
-        [Fact]
-        public void UpdateOne()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T>(document);
-            var content = GetContent();
-            document.SomeContent = content;
-            // Act
-            var result = SUT.UpdateOne<T>(document);
-            // Assert
-            Assert.True(result);
-            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument, GetTestName());
-            Assert.True(content == updatedDocument.SomeContent, GetTestName());
-        }
-
-        [Fact]
-        public async Task UpdateOneAsync()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T>(document);
-            var content = GetContent();
-            document.SomeContent = content;
-            // Act
-            var result = await SUT.UpdateOneAsync<T>(document);
-            // Assert
-            Assert.True(result);
-            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument, GetTestName());
-            Assert.True(content == updatedDocument.SomeContent, GetTestName());
-        }
-
-        [Fact]
-        public void UpdateOneField()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T>(document);
-            var content = GetContent();
-            // Act
-            var result = SUT.UpdateOne<T, string>(document, x => x.SomeContent, content);
-            // Assert
-            Assert.True(result, GetTestName());
-            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument, GetTestName());
-            Assert.True(content == updatedDocument.SomeContent, GetTestName());
-        }
-
-        [Fact]
-        public async Task UpdateOneFieldAsync()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T>(document);
-            var content = GetContent();
-            // Act
-            var result = await SUT.UpdateOneAsync<T, string>(document, x => x.SomeContent, content);
-            // Assert
-            Assert.True(result, GetTestName());
-            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument, GetTestName());
-            Assert.True(content == updatedDocument.SomeContent, GetTestName());
-        }
-
-        [Fact]
-        public void UpdateOneFieldWithFilter()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T>(document);
-            var content = GetContent();
-            // Act
-            var result = SUT.UpdateOne<T, string>(x => x.Id.Equals(document.Id), x => x.SomeContent, content, PartitionKey);
-            // Assert
-            Assert.True(result, GetTestName());
-            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument, GetTestName());
-            Assert.True(content == updatedDocument.SomeContent, GetTestName());
-        }
-
-        [Fact]
-        public async Task UpdateOneFieldWithFilterAsync()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T>(document);
-            var content = GetContent();
-            // Act
-            var result = await SUT.UpdateOneAsync<T, string>(x => x.Id.Equals(document.Id), x => x.SomeContent, content, PartitionKey);
-            // Assert
-            Assert.True(result, GetTestName());
-            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument, GetTestName());
-            Assert.True(content == updatedDocument.SomeContent, GetTestName());
-        }
-
-        [Fact]
-        public async Task UpdateOneAsyncWithUpdateDefinition()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T>(document);
-            var childrenToAdd = new List<Child>
-            {
-                new Child("testType1", "testValue1"),
-                new Child("testType2", "testValue2")
-            };
-
-            var updateDef = MongoDB.Driver.Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
-
-            // Act
-            var result = await SUT.UpdateOneAsync<T>(document, updateDef);
-            // Assert
-            Assert.True(result);
-            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument);
-            Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
-            Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
-            Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
-            Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
-        }
-
-        [Fact]
-        public void UpdateOneWithUpdateDefinition()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T>(document);
-            var childrenToAdd = new List<Child>
-            {
-                new Child("testType1", "testValue1"),
-                new Child("testType2", "testValue2")
-            };
-
-            var updateDef = MongoDB.Driver.Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
-
-            // Act
-            var result = SUT.UpdateOne<T>(document, updateDef);
-            // Assert
-            Assert.True(result);
-            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument);
-            Assert.True(childrenToAdd[0].Type== updatedDocument.Children[0].Type, GetTestName());
-            Assert.True(childrenToAdd[0].Value== updatedDocument.Children[0].Value, GetTestName());
-            Assert.True(childrenToAdd[1].Type== updatedDocument.Children[1].Type, GetTestName());
-            Assert.True(childrenToAdd[1].Value== updatedDocument.Children[1].Value, GetTestName());
-        }
-
-        #endregion Update
-
         #region Delete
 
         [Fact]
@@ -523,12 +423,25 @@ namespace CoreIntegrationTests.Infrastructure
             var criteria = $"{GetTestName()}.{DocumentTypeName}";
             var documents = CreateTestDocuments(5);
             documents.ForEach(e => e.SomeContent = criteria);
+            var canPartition = !string.IsNullOrEmpty(PartitionKey) && documents.Any(e => e is IPartitionedDocument);
+            string secondKey = null;
+            if (canPartition)
+            {
+                secondKey = $"{PartitionKey}-2";
+                ((IPartitionedDocument)documents[3]).PartitionKey = secondKey;
+                ((IPartitionedDocument)documents[4]).PartitionKey = secondKey;
+            }
+
             SUT.AddMany<T>(documents);
             // Act
             var result = await SUT.DeleteManyAsync<T>(documents);
             // Assert
             Assert.True(5 == result);
             Assert.False(SUT.Any<T>(e => e.SomeContent == criteria, PartitionKey), GetTestName());
+            if (canPartition)
+            {
+                Assert.False(SUT.Any<T>(e => e.SomeContent == criteria, secondKey), GetTestName());
+            }
         }
 
         [Fact]
@@ -553,12 +466,25 @@ namespace CoreIntegrationTests.Infrastructure
             var criteria = $"{GetTestName()}.{DocumentTypeName}";
             var documents = CreateTestDocuments(5);
             documents.ForEach(e => e.SomeContent = criteria);
+            var canPartition = !string.IsNullOrEmpty(PartitionKey) && documents.Any(e => e is IPartitionedDocument);
+            string secondKey = null;
+            if (canPartition)
+            {
+                secondKey = $"{PartitionKey}-2";
+                ((IPartitionedDocument)documents[3]).PartitionKey = secondKey;
+                ((IPartitionedDocument)documents[4]).PartitionKey = secondKey;
+            }
+
             SUT.AddMany<T>(documents);
             // Act
             var result = SUT.DeleteMany<T>(documents);
             // Assert
             Assert.True(5 == result);
             Assert.False(SUT.Any<T>(e => e.SomeContent == criteria, PartitionKey), GetTestName());
+            if (canPartition)
+            {
+                Assert.False(SUT.Any<T>(e => e.SomeContent == criteria, secondKey), GetTestName());
+            }
         }
 
         #endregion Delete
@@ -679,7 +605,375 @@ namespace CoreIntegrationTests.Infrastructure
 
         #endregion Project
 
+        #region Max / Min Queries
+
+        [Fact]
+        public async Task GetByMaxAsync()
+        {
+            // Arrange
+            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
+            var documents = CreateTestDocuments(5);
+            var i = 1;
+            documents.ForEach(e =>
+            {
+                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
+                e.SomeContent = criteria;
+            });
+            SUT.AddMany<T>(documents);
+            var expectedMax = documents.OrderByDescending(e => e.Nested.SomeDate).First();
+
+            // Act
+            var result = await SUT.GetByMaxAsync<T>(e => e.SomeContent == criteria, e => e.Nested.SomeDate, PartitionKey);
+
+            // Assert
+            Assert.NotNull(result);
+            Assert.Equal(expectedMax.Id, result.Id);
+        }
+
+        [Fact]
+        public void GetByMax()
+        {
+            // Arrange
+            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
+            var documents = CreateTestDocuments(5);
+            var i = 1;
+            documents.ForEach(e =>
+            {
+                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
+                e.SomeContent = criteria;
+            });
+            SUT.AddMany<T>(documents);
+            var expectedMax = documents.OrderByDescending(e => e.Nested.SomeDate).First();
+
+            // Act
+            var result = SUT.GetByMax<T>(e => e.SomeContent == criteria, e => e.Nested.SomeDate, PartitionKey);
+
+            // Assert
+            Assert.NotNull(result);
+            Assert.Equal(expectedMax.Id, result.Id);
+        }
+
+        [Fact]
+        public async Task GetByMinAsync()
+        {
+            // Arrange
+            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
+            var documents = CreateTestDocuments(5);
+            var i = 1;
+            documents.ForEach(e =>
+            {
+                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
+                e.SomeContent = criteria;
+            });
+            SUT.AddMany<T>(documents);
+            var expectedMin = documents.OrderBy(e => e.Nested.SomeDate).First();
+
+            // Act
+            var result = await SUT.GetByMinAsync<T>(e => e.SomeContent == criteria, e => e.Nested.SomeDate, PartitionKey);
+
+            // Assert
+            Assert.NotNull(result);
+            Assert.Equal(expectedMin.Id, result.Id);
+        }
+
+        [Fact]
+        public void GetByMin()
+        {
+            // Arrange
+            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
+            var documents = CreateTestDocuments(5);
+            var i = 1;
+            documents.ForEach(e =>
+            {
+                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
+                e.SomeContent = criteria;
+            });
+            SUT.AddMany<T>(documents);
+            var expectedMin = documents.OrderBy(e => e.Nested.SomeDate).First();
+
+            // Act
+            var result = SUT.GetByMin<T>(e => e.SomeContent == criteria, e => e.Nested.SomeDate, PartitionKey);
+
+            // Assert
+            Assert.NotNull(result);
+            Assert.Equal(expectedMin.Id, result.Id);
+        }
+
+        [Fact]
+        public void GetMinValue()
+        {
+            // Arrange
+            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
+            var documents = CreateTestDocuments(5);
+            var i = 1;
+            documents.ForEach(e =>
+            {
+                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
+                e.SomeContent = criteria;
+            });
+            SUT.AddMany<T>(documents);
+            var expectedMin = documents.OrderBy(e => e.Nested.SomeDate).First();
+
+            // Act
+            var result = SUT.GetMinValue<T, DateTime>(e => e.SomeContent == criteria, e => e.Nested.SomeDate, PartitionKey);
+
+            // Assert
+            Assert.True(result != default(DateTime));
+            Assert.Equal(expectedMin.Nested.SomeDate.Date, result.Date);
+        }
+
+        [Fact]
+        public async Task GetMinValueAsync()
+        {
+            // Arrange
+            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
+            var documents = CreateTestDocuments(5);
+            var i = 1;
+            documents.ForEach(e =>
+            {
+                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
+                e.SomeContent = criteria;
+            });
+            SUT.AddMany<T>(documents);
+            var expectedMin = documents.OrderBy(e => e.Nested.SomeDate).First();
+
+            // Act
+            var result = await SUT.GetMinValueAsync<T, DateTime>(e => e.SomeContent == criteria, e => e.Nested.SomeDate, PartitionKey);
+
+            // Assert
+            Assert.True(result != default(DateTime));
+            Assert.Equal(expectedMin.Nested.SomeDate.Date, result.Date);
+        }
+
+        [Fact]
+        public void GetMaxValue()
+        {
+            // Arrange
+            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
+            var documents = CreateTestDocuments(5);
+            var i = 1;
+            documents.ForEach(e =>
+            {
+                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
+                e.SomeContent = criteria;
+            });
+            SUT.AddMany<T>(documents);
+            var expectedMax = documents.OrderByDescending(e => e.Nested.SomeDate).First();
+
+            // Act
+            var result = SUT.GetMaxValue<T, DateTime>(e => e.SomeContent == criteria, e => e.Nested.SomeDate, PartitionKey);
+
+            // Assert
+            Assert.True(result != default(DateTime));
+            Assert.Equal(expectedMax.Nested.SomeDate.Date, result.Date);
+        }
+
+        [Fact]
+        public async Task GetMaxValueAsync()
+        {
+            // Arrange
+            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
+            var documents = CreateTestDocuments(5);
+            var i = 1;
+            documents.ForEach(e =>
+            {
+                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
+                e.SomeContent = criteria;
+            });
+            SUT.AddMany<T>(documents);
+            var expectedMin = documents.OrderByDescending(e => e.Nested.SomeDate).First();
+
+            // Act
+            var result = await SUT.GetMaxValueAsync<T, DateTime>(e => e.SomeContent == criteria, e => e.Nested.SomeDate, PartitionKey);
+
+            // Assert
+            Assert.True(result != default(DateTime));
+            Assert.Equal(expectedMin.Nested.SomeDate.Date, result.Date);
+        }
+
+        #endregion Max / Min Queries
+
+        #region Index Management
+
+        static SemaphoreSlim textIndexSemaphore = new SemaphoreSlim(1, 1);
+
+        [Fact]
+        public async Task CreateTextIndexNoOptionAsync()
+        {
+            // Arrange 
+            const string expectedIndexName = "SomeContent_text";
+
+            // Act
+            await textIndexSemaphore.WaitAsync();
+            try
+            {
+                var result = await SUT.CreateTextIndexAsync<T>(x => x.SomeContent, null, PartitionKey);
+
+                // Assert
+                var listOfIndexNames = await SUT.GetIndexesNamesAsync<T>(PartitionKey);
+                Assert.Contains(expectedIndexName, listOfIndexNames);
+
+                // Cleanup 
+                await SUT.DropIndexAsync<T>(expectedIndexName, PartitionKey);
+            }
+            finally
+            {
+                textIndexSemaphore.Release();
+            }
+        }
+
+        [Fact]
+        public async Task CreateTextIndexWithOptionAsync()
+        {
+            // Arrange
+            string expectedIndexName = $"{Guid.NewGuid()}";
+            var option = new IndexCreationOptions
+            {
+                Name = expectedIndexName
+            };
+            await textIndexSemaphore.WaitAsync();
+            try
+            {
+                // Act
+                var result = await SUT.CreateTextIndexAsync<T>(x => x.AddedAtUtc, option, PartitionKey);
+
+                // Assert
+                var listOfIndexNames = await SUT.GetIndexesNamesAsync<T>(PartitionKey);
+                Assert.Contains(expectedIndexName, listOfIndexNames);
+
+                // Cleanup
+                await SUT.DropIndexAsync<T>(expectedIndexName, PartitionKey);
+            }
+            finally
+            {
+                textIndexSemaphore.Release();
+            }
+        }
+
+        [Fact]
+        public async Task CreateAscendingIndexAsync()
+        {
+            // Arrange 
+            const string expectedIndexName = "SomeContent_1";
+
+            // Act
+            var result = await SUT.CreateAscendingIndexAsync<T>(x => x.SomeContent, null, PartitionKey);
+
+            // Assert
+            var listOfIndexNames = await SUT.GetIndexesNamesAsync<T>(PartitionKey);
+            Assert.Contains(expectedIndexName, listOfIndexNames);
+
+            // Cleanup 
+            await SUT.DropIndexAsync<T>(expectedIndexName, PartitionKey);
+        }
+
+        [Fact]
+        public async Task CreateDescendingIndexAsync()
+        {
+            // Arrange 
+            const string expectedIndexName = "SomeContent_-1";
+
+            // Act
+            var result = await SUT.CreateDescendingIndexAsync<T>(x => x.SomeContent, null, PartitionKey);
+
+            // Assert
+            var listOfIndexNames = await SUT.GetIndexesNamesAsync<T>(PartitionKey);
+            Assert.Contains(expectedIndexName, listOfIndexNames);
+
+            // Cleanup 
+            await SUT.DropIndexAsync<T>(expectedIndexName, PartitionKey);
+        }
+
+        [Fact]
+        public async Task CreateHashedIndexAsync()
+        {
+            // Arrange 
+            const string expectedIndexName = "SomeContent_hashed";
+
+            // Act
+            var result = await SUT.CreateHashedIndexAsync<T>(x => x.SomeContent, null, PartitionKey);
+
+            // Assert
+            var listOfIndexNames = await SUT.GetIndexesNamesAsync<T>(PartitionKey);
+            Assert.Contains(expectedIndexName, listOfIndexNames);
+
+            // Cleanup 
+            await SUT.DropIndexAsync<T>(expectedIndexName, PartitionKey);
+        }
+
+        [Fact]
+        public async Task CreateCombinedTextIndexAsync()
+        {
+            // Arrange 
+            const string expectedIndexName = "SomeContent2_text_SomeContent3_text";
+
+            // Act
+            Expression <Func<T, object>> ex = x => x.SomeContent2;
+            Expression <Func<T, object>> ex2 = x => x.SomeContent3;
+            var result = await SUT.CreateCombinedTextIndexAsync<T>(new[] { ex, ex2 }, null, PartitionKey);
+
+            // Assert
+            var listOfIndexNames = await SUT.GetIndexesNamesAsync<T>(PartitionKey);
+            Assert.Contains(expectedIndexName, listOfIndexNames);
+
+            // Cleanup 
+            await SUT.DropIndexAsync<T>(expectedIndexName, PartitionKey);
+        }
+
+        #endregion Index Management
+
+        #region Math
+
+        [Fact]
+        public async Task SumByDecimalAsync()
+        {
+            // Arrange
+            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
+            var documents = CreateTestDocuments(5);
+            var i = 1;
+            documents.ForEach(e =>
+            {
+                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
+                e.Nested.SomeAmount = 5m;
+                e.SomeContent = criteria;
+            });
+            SUT.AddMany<T>(documents);
+            var expectedSum = documents.Sum(e => e.Nested.SomeAmount);
+
+            // Act
+            var result = await SUT.SumByAsync<T>(e => e.SomeContent == criteria, e => e.Nested.SomeAmount, PartitionKey);
+
+            // Assert
+            Assert.Equal(expectedSum, result);
+        }
+
+        [Fact]
+        public void SumByDecimal()
+        {
+            // Arrange
+            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
+            var documents = CreateTestDocuments(5);
+            var i = 1;
+            documents.ForEach(e =>
+            {
+                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
+                e.Nested.SomeAmount = 5m;
+                e.SomeContent = criteria;
+            });
+            SUT.AddMany<T>(documents);
+            var expectedSum = documents.Sum(e => e.Nested.SomeAmount);
+
+            // Act
+            var result = SUT.SumBy<T>(e => e.SomeContent == criteria, e => e.Nested.SomeAmount, PartitionKey);
+
+            // Assert
+            Assert.Equal(expectedSum, result);
+        }
+
+        #endregion Math
+
         #region Test Utils
+
         [MethodImpl(MethodImplOptions.NoInlining)]
         private string GetCurrentMethod()
         {

CoreIntegrationTests/Infrastructure/MongoDbDocumentTestBase.Update.cs

@@ -0,0 +1,381 @@
+using MongoDB.Driver;
+using MongoDbGenericRepository;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Runtime.CompilerServices;
+using System.Threading;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace CoreIntegrationTests.Infrastructure
+{
+    public abstract partial class MongoDbDocumentTestBase<T> :
+        IClassFixture<MongoDbTestFixture<T, Guid>>
+        where T : TestDoc, new()
+    {
+        #region Update One
+
+        [Fact]
+        public void UpdateOne()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T>(document);
+            var content = GetContent();
+            document.SomeContent = content;
+            // Act
+            var result = SUT.UpdateOne<T>(document);
+            // Assert
+            Assert.True(result);
+            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument, GetTestName());
+            Assert.True(content == updatedDocument.SomeContent, GetTestName());
+        }
+
+        [Fact]
+        public async Task UpdateOneAsync()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T>(document);
+            var content = GetContent();
+            document.SomeContent = content;
+            // Act
+            var result = await SUT.UpdateOneAsync<T>(document);
+            // Assert
+            Assert.True(result);
+            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument, GetTestName());
+            Assert.True(content == updatedDocument.SomeContent, GetTestName());
+        }
+
+        [Fact]
+        public void UpdateOneField()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T>(document);
+            var content = GetContent();
+            // Act
+            var result = SUT.UpdateOne<T, string>(document, x => x.SomeContent, content);
+            // Assert
+            Assert.True(result, GetTestName());
+            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument, GetTestName());
+            Assert.True(content == updatedDocument.SomeContent, GetTestName());
+        }
+
+        [Fact]
+        public async Task UpdateOneFieldAsync()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T>(document);
+            var content = GetContent();
+            // Act
+            var result = await SUT.UpdateOneAsync<T, string>(document, x => x.SomeContent, content);
+            // Assert
+            Assert.True(result, GetTestName());
+            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument, GetTestName());
+            Assert.True(content == updatedDocument.SomeContent, GetTestName());
+        }
+
+        [Fact]
+        public void UpdateOneFieldWithFilter()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T>(document);
+            var content = GetContent();
+            // Act
+            var result = SUT.UpdateOne<T, string>(x => x.Id.Equals(document.Id), x => x.SomeContent, content, PartitionKey);
+            // Assert
+            Assert.True(result, GetTestName());
+            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument, GetTestName());
+            Assert.True(content == updatedDocument.SomeContent, GetTestName());
+        }
+
+        [Fact]
+        public async Task UpdateOneFieldWithFilterAsync()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T>(document);
+            var content = GetContent();
+            // Act
+            var result = await SUT.UpdateOneAsync<T, string>(x => x.Id.Equals(document.Id), x => x.SomeContent, content, PartitionKey);
+            // Assert
+            Assert.True(result, GetTestName());
+            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument, GetTestName());
+            Assert.True(content == updatedDocument.SomeContent, GetTestName());
+        }
+
+        [Fact]
+        public async Task UpdateOneAsyncWithUpdateDefinition()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T>(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = MongoDB.Driver.Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            // Act
+            var result = await SUT.UpdateOneAsync<T>(document, updateDef);
+            // Assert
+            Assert.True(result);
+            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument);
+            Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
+            Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
+            Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
+            Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
+        }
+
+        [Fact]
+        public void UpdateOneWithUpdateDefinition()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T>(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = MongoDB.Driver.Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            // Act
+            var result = SUT.UpdateOne<T>(document, updateDef);
+            // Assert
+            Assert.True(result);
+            var updatedDocument = SUT.GetById<T>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument);
+            Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
+            Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
+            Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
+            Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
+        }
+
+        #endregion Update One
+
+        #region Update Many
+
+        [Fact]
+        public async Task UpdateManyWithLinqFilterAsync()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T>(documents);
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var content = GetContent();
+            // Act
+            var result = await SUT.UpdateManyAsync<T, string>(x => docIds.Contains(x.Id), x => x.SomeContent, content, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocument = SUT.GetAll<T>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocument.Count == 2);
+            Assert.True(updatedDocument.All(u => u.SomeContent == content), GetTestName());
+        }
+
+        [Fact]
+        public async Task UpdateManyWithFilterDefinitionAsync()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T>(documents);
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var filterDefinition = Builders<T>.Filter.Where(x => docIds.Contains(x.Id));
+            var content = GetContent();
+            // Act
+            var result = await SUT.UpdateManyAsync<T, string>(filterDefinition, x => x.SomeContent, content, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocument = SUT.GetAll<T>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocument.Count == 2);
+            Assert.True(updatedDocument.All(u => u.SomeContent == content), GetTestName());
+        }
+
+        [Fact]
+        public async Task UpdateManyWithLinqFilterAndUpdateDefinitionAsync()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T>(documents);
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+            var content = GetContent();
+            // Act
+            var result = await SUT.UpdateManyAsync<T>(x => docIds.Contains(x.Id), updateDef, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocuments = SUT.GetAll<T>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocuments.Count == 2);
+            updatedDocuments.ForEach(updatedDocument =>
+            {
+                Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
+                Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
+                Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
+                Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
+            });
+        }
+
+        [Fact]
+        public async Task UpdateManyWithFilterAndUpdateDefinitionsAsync()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T>(documents);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var filterDefinition = Builders<T>.Filter.Where(x => docIds.Contains(x.Id));
+            var content = GetContent();
+            // Act
+            var result = await SUT.UpdateManyAsync<T>(filterDefinition, updateDef, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocuments = SUT.GetAll<T>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocuments.Count == 2);
+            updatedDocuments.ForEach(updatedDocument =>
+            {
+                Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
+                Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
+                Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
+                Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
+            });
+        }
+
+
+        [Fact]
+        public void UpdateManyWithLinqFilter()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T>(documents);
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var content = GetContent();
+            // Act
+            var result = SUT.UpdateMany<T, string>(x => docIds.Contains(x.Id), x => x.SomeContent, content, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocument = SUT.GetAll<T>(x => docIds.Contains(x.Id), PartitionKey);
+            Assert.True(updatedDocument.Count == 2);
+            Assert.True(updatedDocument.All(u => u.SomeContent == content), GetTestName());
+        }
+
+        [Fact]
+        public void UpdateManyWithFilterDefinition()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T>(documents);
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var filterDefinition = Builders<T>.Filter.Where(x => docIds.Contains(x.Id));
+            var content = GetContent();
+            // Act
+            var result = SUT.UpdateMany<T, string>(filterDefinition, x => x.SomeContent, content, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocument = SUT.GetAll<T>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocument.Count == 2);
+            Assert.True(updatedDocument.All(u => u.SomeContent == content), GetTestName());
+        }
+
+        [Fact]
+        public void UpdateManyWithLinqFilterAndUpdateDefinition()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T>(documents);
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+            var content = GetContent();
+            // Act
+            var result = SUT.UpdateMany<T>(x => docIds.Contains(x.Id), updateDef, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocuments = SUT.GetAll<T>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocuments.Count == 2);
+            updatedDocuments.ForEach(updatedDocument =>
+            {
+                Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
+                Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
+                Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
+                Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
+            });
+        }
+
+        [Fact]
+        public void UpdateManyWithFilterAndUpdateDefinitions()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T>(documents);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var filterDefinition = Builders<T>.Filter.Where(x => docIds.Contains(x.Id));
+            var content = GetContent();
+            // Act
+            var result = SUT.UpdateMany<T>(filterDefinition, updateDef, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocuments = SUT.GetAll<T>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocuments.Count == 2);
+            updatedDocuments.ForEach(updatedDocument =>
+            {
+                Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
+                Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
+                Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
+                Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
+            });
+        }
+
+
+        #endregion Update Many
+    }
+}

CoreIntegrationTests/Infrastructure/MongoDbTKeyDocumentTestBase.Update.cs

@@ -0,0 +1,377 @@
+using MongoDB.Driver;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace CoreIntegrationTests.Infrastructure
+{
+    public abstract partial class MongoDbTKeyDocumentTestBase<T, TKey> :
+        IClassFixture<MongoDbTestFixture<T, TKey>>
+        where T : TestDoc<TKey>, new()
+        where TKey : IEquatable<TKey>
+
+    {
+        #region Update One
+
+        [Fact]
+        public void UpdateOne()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T, TKey>(document);
+            var content = GetContent();
+            document.SomeContent = content;
+            // Act
+            var result = SUT.UpdateOne<T, TKey>(document);
+            // Assert
+            Assert.True(result);
+            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument, GetTestName());
+            Assert.True(content == updatedDocument.SomeContent, GetTestName());
+        }
+
+        [Fact]
+        public async Task UpdateOneAsync()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T, TKey>(document);
+            var content = GetContent();
+            document.SomeContent = content;
+            // Act
+            var result = await SUT.UpdateOneAsync<T, TKey>(document);
+            // Assert
+            Assert.True(result);
+            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument, GetTestName());
+            Assert.True(content == updatedDocument.SomeContent, GetTestName());
+        }
+
+        [Fact]
+        public void UpdateOneField()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T, TKey>(document);
+            var content = GetContent();
+            // Act
+            var result = SUT.UpdateOne<T, TKey, string>(document, x => x.SomeContent, content);
+            // Assert
+            Assert.True(result, GetTestName());
+            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument, GetTestName());
+            Assert.True(content == updatedDocument.SomeContent, GetTestName());
+        }
+
+        [Fact]
+        public async Task UpdateOneFieldAsync()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T, TKey>(document);
+            var content = GetContent();
+            // Act
+            var result = await SUT.UpdateOneAsync<T, TKey, string>(document, x => x.SomeContent, content);
+            // Assert
+            Assert.True(result, GetTestName());
+            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument, GetTestName());
+            Assert.True(content == updatedDocument.SomeContent, GetTestName());
+        }
+
+        [Fact]
+        public void UpdateOneFieldWithFilter()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T, TKey>(document);
+            var content = GetContent();
+            // Act
+            var result = SUT.UpdateOne<T, TKey, string>(x => x.Id.Equals(document.Id), x => x.SomeContent, content, PartitionKey);
+            // Assert
+            Assert.True(result, GetTestName());
+            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument, GetTestName());
+            Assert.True(content == updatedDocument.SomeContent, GetTestName());
+        }
+
+        [Fact]
+        public async Task UpdateOneFieldWithFilterAsync()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T, TKey>(document);
+            var content = GetContent();
+            // Act
+            var result = await SUT.UpdateOneAsync<T, TKey, string>(x => x.Id.Equals(document.Id), x => x.SomeContent, content, PartitionKey);
+            // Assert
+            Assert.True(result, GetTestName());
+            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument, GetTestName());
+            Assert.True(content == updatedDocument.SomeContent, GetTestName());
+        }
+
+        [Fact]
+        public async Task UpdateOneAsyncWithUpdateDefinition()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T, TKey>(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = MongoDB.Driver.Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            // Act
+            var result = await SUT.UpdateOneAsync<T, TKey>(document, updateDef);
+            // Assert
+            Assert.True(result);
+            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument);
+            Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
+            Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
+            Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
+            Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
+        }
+
+        [Fact]
+        public void UpdateOneWithUpdateDefinition()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<T, TKey>(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = MongoDB.Driver.Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            // Act
+            var result = SUT.UpdateOne<T, TKey>(document, updateDef);
+            // Assert
+            Assert.True(result);
+            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
+            Assert.True(null != updatedDocument);
+            Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
+            Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
+            Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
+            Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
+        }
+
+        #endregion Update One
+
+        #region Update Many
+
+        [Fact]
+        public async Task UpdateManyWithLinqFilterAsync()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T, TKey>(documents);
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var content = GetContent();
+            // Act
+            var result = await SUT.UpdateManyAsync<T, TKey, string>(x => docIds.Contains(x.Id), x => x.SomeContent, content, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocument = SUT.GetAll<T, TKey>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocument.Count == 2);
+            Assert.True(updatedDocument.All(u => u.SomeContent == content), GetTestName());
+        }
+
+        [Fact]
+        public async Task UpdateManyWithFilterDefinitionAsync()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T, TKey>(documents);
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var filterDefinition = Builders<T>.Filter.Where(x => docIds.Contains(x.Id));
+            var content = GetContent();
+            // Act
+            var result = await SUT.UpdateManyAsync<T, TKey, string>(filterDefinition, x => x.SomeContent, content, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocument = SUT.GetAll<T, TKey>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocument.Count == 2);
+            Assert.True(updatedDocument.All(u => u.SomeContent == content), GetTestName());
+        }
+
+        [Fact]
+        public async Task UpdateManyWithLinqFilterAndUpdateDefinitionAsync()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T, TKey>(documents);
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+            var content = GetContent();
+            // Act
+            var result = await SUT.UpdateManyAsync<T, TKey>(x => docIds.Contains(x.Id), updateDef, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocuments = SUT.GetAll<T, TKey>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocuments.Count == 2);
+            updatedDocuments.ForEach(updatedDocument =>
+            {
+                Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
+                Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
+                Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
+                Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
+            });
+        }
+
+        [Fact]
+        public async Task UpdateManyWithFilterAndUpdateDefinitionsAsync()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T, TKey>(documents);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var filterDefinition = Builders<T>.Filter.Where(x => docIds.Contains(x.Id));
+            var content = GetContent();
+            // Act
+            var result = await SUT.UpdateManyAsync<T, TKey>(filterDefinition, updateDef, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocuments = SUT.GetAll<T, TKey>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocuments.Count == 2);
+            updatedDocuments.ForEach(updatedDocument =>
+            {
+                Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
+                Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
+                Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
+                Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
+            });
+        }
+
+
+        [Fact]
+        public void UpdateManyWithLinqFilter()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T, TKey>(documents);
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var content = GetContent();
+            // Act
+            var result = SUT.UpdateMany<T, TKey, string>(x => docIds.Contains(x.Id), x => x.SomeContent, content, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocument = SUT.GetAll<T, TKey>(x => docIds.Contains(x.Id), PartitionKey);
+            Assert.True(updatedDocument.Count == 2);
+            Assert.True(updatedDocument.All(u => u.SomeContent == content), GetTestName());
+        }
+
+        [Fact]
+        public void UpdateManyWithFilterDefinition()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T, TKey>(documents);
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var filterDefinition = Builders<T>.Filter.Where(x => docIds.Contains(x.Id));
+            var content = GetContent();
+            // Act
+            var result = SUT.UpdateMany<T, TKey, string>(filterDefinition, x => x.SomeContent, content, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocument = SUT.GetAll<T, TKey>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocument.Count == 2);
+            Assert.True(updatedDocument.All(u => u.SomeContent == content), GetTestName());
+        }
+
+        [Fact]
+        public void UpdateManyWithLinqFilterAndUpdateDefinition()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T, TKey>(documents);
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+            var content = GetContent();
+            // Act
+            var result = SUT.UpdateMany<T, TKey>(x => docIds.Contains(x.Id), updateDef, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocuments = SUT.GetAll<T, TKey>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocuments.Count == 2);
+            updatedDocuments.ForEach(updatedDocument =>
+            {
+                Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
+                Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
+                Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
+                Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
+            });
+        }
+
+        [Fact]
+        public void UpdateManyWithFilterAndUpdateDefinitions()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(2);
+            SUT.AddMany<T, TKey>(documents);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            var docIds = documents.Select(u => u.Id).ToArray();
+            var filterDefinition = Builders<T>.Filter.Where(x => docIds.Contains(x.Id));
+            var content = GetContent();
+            // Act
+            var result = SUT.UpdateMany<T, TKey>(filterDefinition, updateDef, PartitionKey);
+            // Assert
+            Assert.True(result == 2, GetTestName());
+            var updatedDocuments = SUT.GetAll<T, TKey>(x => docIds.Contains(x.Id), PartitionKey);
+
+            Assert.True(updatedDocuments.Count == 2);
+            updatedDocuments.ForEach(updatedDocument =>
+            {
+                Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
+                Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
+                Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
+                Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
+            });
+        }
+
+
+        #endregion Update Many
+    }
+}

CoreIntegrationTests/Infrastructure/MongoDbTKeyDocumentTestBase.cs

@@ -1,728 +0,0 @@
-using MongoDbGenericRepository.Models;
-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Linq;
-using System.Runtime.CompilerServices;
-using System.Threading.Tasks;
-using Xunit;
-
-namespace CoreIntegrationTests.Infrastructure
-{
-    public abstract class MongoDbTKeyDocumentTestBase<T, TKey> : 
-        IClassFixture<MongoDbTestFixture<T, TKey>>
-        where T: TestDoc<TKey>, new()
-        where TKey : IEquatable<TKey>
-        
-    {
-        private readonly MongoDbTestFixture<T, TKey> _fixture;
-
-        protected MongoDbTKeyDocumentTestBase(MongoDbTestFixture<T, TKey> fixture)
-        {
-            _fixture = fixture;
-            var type = CreateTestDocument();
-            DocumentTypeName = type.GetType().FullName;
-            if (type is IPartitionedDocument)
-            {
-                PartitionKey = ((IPartitionedDocument)type).PartitionKey;
-            }
-            _fixture.PartitionKey = PartitionKey;
-            TestClassName = GetClassName();
-            MongoDbConfig.EnsureConfigured();
-            SUT = TestRepository.Instance;
-        }
-
-        public abstract string GetClassName();
-
-        public T CreateTestDocument()
-        {
-            return _fixture.CreateTestDocument();
-        }
-
-        public List<T> CreateTestDocuments(int numberOfDocumentsToCreate)
-        {
-            return _fixture.CreateTestDocuments(numberOfDocumentsToCreate);
-        }
-
-        /// <summary>
-        /// The partition key for the collection, if any
-        /// </summary>
-        protected string PartitionKey { get; set; }
-
-        /// <summary>
-        /// the name of the test class
-        /// </summary>
-        protected string TestClassName { get; set; }
-
-        /// <summary>
-        /// The name of the document used for tests
-        /// </summary>
-        protected string DocumentTypeName { get; set; }
-
-        /// <summary>
-        /// SUT: System Under Test
-        /// </summary>
-        protected static ITestRepository SUT { get; set; }
-
-        #region Add
-
-        [Fact]
-        public void AddOne()
-        {
-            // Arrange
-            var document = new T();
-            // Act
-            SUT.AddOne<T, TKey>(document);
-            // Assert
-            long count = string.IsNullOrEmpty(PartitionKey) ? SUT.Count<T, TKey>(e => e.Id.Equals(document.Id)) 
-                                                            : SUT.Count<T, TKey>(e => e.Id.Equals(document.Id), PartitionKey);
-            Assert.True(1 == count, GetTestName());
-        }
-
-        [Fact]
-        public async Task AddOneAsync()
-        {
-            // Arrange
-            var document = new T();
-            // Act
-            await SUT.AddOneAsync<T, TKey>(document);
-            // Assert
-            long count = string.IsNullOrEmpty(PartitionKey) ? SUT.Count<T, TKey>(e => e.Id.Equals(document.Id))
-                                                            : SUT.Count<T, TKey>(e => e.Id.Equals(document.Id), PartitionKey);
-            Assert.True (1 == count, GetTestName());
-        }
-
-        [Fact]
-        public void AddMany()
-        {
-            // Arrange
-            var documents = new List<T> { new T(), new T() };
-            // Act
-            SUT.AddMany<T, TKey>(documents);
-            // Assert
-            long count = string.IsNullOrEmpty(PartitionKey) ? SUT.Count<T, TKey>(e => e.Id.Equals(documents[0].Id)
-                                                                                   || e.Id.Equals(documents[1].Id))
-                                                            : SUT.Count<T, TKey>(e => e.Id.Equals(documents[0].Id)
-                                                                                  || e.Id.Equals(documents[1].Id), PartitionKey);
-            Assert.True (2 == count, GetTestName());
-        }
-
-        [Fact]
-        public async Task AddManyAsync()
-        {
-            // Arrange
-            var documents = new List<T> { new T(), new T() };
-            // Act
-            await SUT.AddManyAsync<T, TKey>(documents);
-            // Assert
-            long count = string.IsNullOrEmpty(PartitionKey) ? SUT.Count<T, TKey>(e => e.Id.Equals(documents[0].Id)
-                                                                                   || e.Id.Equals(documents[1].Id))
-                                                            : SUT.Count<T, TKey>(e => e.Id.Equals(documents[0].Id)
-                                                                                  || e.Id.Equals(documents[1].Id), PartitionKey);
-            Assert.True (2 == count, GetTestName());
-        }
-
-
-        #endregion Add
-
-        #region Read
-
-        [Fact]
-        public async Task GetByIdAsync()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = await SUT.GetByIdAsync<T, TKey>(document.Id, PartitionKey);
-            // Assert
-            Assert.True(null != result, GetTestName());
-        }
-
-        [Fact]
-        public void GetById()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = SUT.GetById<T, TKey>(document.Id, PartitionKey);
-            // Assert
-            Assert.True(null != result, GetTestName());
-        }
-
-        [Fact]
-        public async Task GetOneAsync()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = await SUT.GetOneAsync<T, TKey>(x => x.Id.Equals(document.Id), PartitionKey);
-            // Assert
-            Assert.True(null != result, GetTestName());
-        }
-
-        [Fact]
-        public void GetOne()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = SUT.GetOne<T, TKey>(x => x.Id.Equals(document.Id), PartitionKey);
-            // Assert
-            Assert.True(null != result, GetTestName());
-        }
-
-        [Fact]
-        public void GetCursor()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var cursor = SUT.GetCursor<T, TKey>(x => x.Id.Equals(document.Id), PartitionKey);
-            var count = cursor.Count();
-            // Assert
-            Assert.True (1 == count, GetTestName());
-        }
-
-        [Fact]
-        public async Task AnyAsyncReturnsTrue()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = await SUT.AnyAsync<T, TKey>(x => x.Id.Equals(document.Id), PartitionKey);
-            // Assert
-            Assert.True(result, GetTestName());
-        }
-
-        [Fact]
-        public async Task AnyAsyncReturnsFalse()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = await SUT.AnyAsync<T, TKey>(x => x.Id.Equals(document.Init<TKey>()), PartitionKey);
-            // Assert
-            Assert.False(result, GetTestName());
-        }
-
-        [Fact]
-        public void AnyReturnsTrue()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = SUT.Any<T, TKey>(x => x.Id.Equals(document.Id), PartitionKey);
-            // Assert
-            Assert.True(result, GetTestName());
-        }
-
-        [Fact]
-        public void AnyReturnsFalse()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = SUT.Any<T, TKey>(x => x.Id.Equals(document.Init<TKey>()), PartitionKey);
-            // Assert
-            Assert.False(result, GetTestName());
-        }
-
-        [Fact]
-        public async Task GetAllAsync()
-        {
-            // Arrange
-            var documents = CreateTestDocuments(5);
-            var content = GetContent();
-            documents.ForEach(e => e.SomeContent = content);
-            SUT.AddMany<T, TKey>(documents);
-            // Act
-            var result = await SUT.GetAllAsync<T, TKey>(x => x.SomeContent == content, PartitionKey);
-            // Assert
-            Assert.True(5 == result.Count, GetTestName());
-        }
-
-        [Fact]
-        public void GetAll()
-        {
-            // Arrange
-            var documents = CreateTestDocuments(5);
-            var content = GetContent();
-            documents.ForEach(e => e.SomeContent = content);
-            SUT.AddMany<T, TKey>(documents);
-            // Act
-            var result = SUT.GetAll<T, TKey>(x => x.SomeContent == content, PartitionKey);
-            // Assert
-            Assert.True(5 == result.Count, GetTestName());
-        }
-
-        [Fact]
-        public async Task CountAsync()
-        {
-            // Arrange
-            var documents = CreateTestDocuments(5);
-            var content = GetContent();
-            documents.ForEach(e => e.SomeContent = content);
-            SUT.AddMany<T, TKey>(documents);
-            // Act
-            var result = await SUT.CountAsync<T, TKey>(x => x.SomeContent == content, PartitionKey);
-            // Assert
-            Assert.True(5 == result, GetTestName());
-        }
-
-        [Fact]
-        public void Count()
-        {
-            // Arrange
-            var documents = CreateTestDocuments(5);
-            var content = GetContent();
-            documents.ForEach(e => e.SomeContent = content);
-            SUT.AddMany<T, TKey>(documents);
-            // Act
-            var result = SUT.Count<T, TKey>(x => x.SomeContent == content, PartitionKey);
-            // Assert
-            Assert.True(5 == result, GetTestName());
-        }
-
-        #endregion Read
-
-        #region Update
-
-        [Fact]
-        public void UpdateOne()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            var content = GetContent();
-            document.SomeContent = content;
-            // Act
-            var result = SUT.UpdateOne<T, TKey>(document);
-            // Assert
-            Assert.True(result);
-            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument, GetTestName());
-            Assert.True(content == updatedDocument.SomeContent, GetTestName());
-        }
-
-        [Fact]
-        public async Task UpdateOneAsync()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            var content = GetContent();
-            document.SomeContent = content;
-            // Act
-            var result = await SUT.UpdateOneAsync<T, TKey>(document);
-            // Assert
-            Assert.True(result);
-            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument, GetTestName());
-            Assert.True(content == updatedDocument.SomeContent, GetTestName());
-        }
-
-        [Fact]
-        public void UpdateOneField()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            var content = GetContent();
-            // Act
-            var result = SUT.UpdateOne<T, TKey, string>(document, x => x.SomeContent, content);
-            // Assert
-            Assert.True(result, GetTestName());
-            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument, GetTestName());
-            Assert.True(content == updatedDocument.SomeContent, GetTestName());
-        }
-
-        [Fact]
-        public async Task UpdateOneFieldAsync()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            var content = GetContent();
-            // Act
-            var result = await SUT.UpdateOneAsync<T, TKey, string>(document, x => x.SomeContent, content);
-            // Assert
-            Assert.True(result, GetTestName());
-            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument, GetTestName());
-            Assert.True(content == updatedDocument.SomeContent, GetTestName());
-        }
-
-        [Fact]
-        public void UpdateOneFieldWithFilter()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            var content = GetContent();
-            // Act
-            var result = SUT.UpdateOne<T, TKey, string>(x => x.Id.Equals(document.Id), x => x.SomeContent, content, PartitionKey);
-            // Assert
-            Assert.True(result, GetTestName());
-            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument, GetTestName());
-            Assert.True(content == updatedDocument.SomeContent, GetTestName());
-        }
-
-        [Fact]
-        public async Task UpdateOneFieldWithFilterAsync()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            var content = GetContent();
-            // Act
-            var result = await SUT.UpdateOneAsync<T, TKey, string>(x => x.Id.Equals(document.Id), x => x.SomeContent, content, PartitionKey);
-            // Assert
-            Assert.True(result, GetTestName());
-            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument, GetTestName());
-            Assert.True(content == updatedDocument.SomeContent, GetTestName());
-        }
-
-        [Fact]
-        public async Task UpdateOneAsyncWithUpdateDefinition()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            var childrenToAdd = new List<Child>
-            {
-                new Child("testType1", "testValue1"),
-                new Child("testType2", "testValue2")
-            };
-
-            var updateDef = MongoDB.Driver.Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
-
-            // Act
-            var result = await SUT.UpdateOneAsync<T, TKey>(document, updateDef);
-            // Assert
-            Assert.True(result);
-            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument);
-            Assert.True(childrenToAdd[0].Type == updatedDocument.Children[0].Type, GetTestName());
-            Assert.True(childrenToAdd[0].Value == updatedDocument.Children[0].Value, GetTestName());
-            Assert.True(childrenToAdd[1].Type == updatedDocument.Children[1].Type, GetTestName());
-            Assert.True(childrenToAdd[1].Value == updatedDocument.Children[1].Value, GetTestName());
-        }
-
-        [Fact]
-        public void UpdateOneWithUpdateDefinition()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            var childrenToAdd = new List<Child>
-            {
-                new Child("testType1", "testValue1"),
-                new Child("testType2", "testValue2")
-            };
-
-            var updateDef = MongoDB.Driver.Builders<T>.Update.AddToSetEach(p => p.Children, childrenToAdd);
-
-            // Act
-            var result = SUT.UpdateOne<T, TKey>(document, updateDef);
-            // Assert
-            Assert.True(result);
-            var updatedDocument = SUT.GetById<T, TKey>(document.Id, PartitionKey);
-            Assert.True(null != updatedDocument);
-            Assert.True(childrenToAdd[0].Type== updatedDocument.Children[0].Type, GetTestName());
-            Assert.True(childrenToAdd[0].Value== updatedDocument.Children[0].Value, GetTestName());
-            Assert.True(childrenToAdd[1].Type== updatedDocument.Children[1].Type, GetTestName());
-            Assert.True(childrenToAdd[1].Value== updatedDocument.Children[1].Value, GetTestName());
-        }
-
-        #endregion Update
-
-        #region Delete
-
-        [Fact]
-        public void DeleteOne()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = SUT.DeleteOne<T, TKey>(document);
-            // Assert
-            Assert.True (1 == result);
-            Assert.False(SUT.Any<T, TKey>(e => e.Id.Equals(document.Id), PartitionKey), GetTestName());
-        }
-
-        [Fact]
-        public void DeleteOneLinq()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = SUT.DeleteOne<T, TKey>(e => e.Id.Equals(document.Id), PartitionKey);
-            // Assert
-            Assert.True (1 == result);
-            Assert.False(SUT.Any<T, TKey>(e => e.Id.Equals(document.Id), PartitionKey), GetTestName());
-        }
-
-        [Fact]
-        public async Task DeleteOneAsync()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = await SUT.DeleteOneAsync<T, TKey>(document);
-            // Assert
-            Assert.True (1 == result);
-            Assert.False(SUT.Any<T, TKey>(e => e.Id.Equals(document.Id), PartitionKey), GetTestName());
-        }
-
-        [Fact]
-        public async Task DeleteOneAsyncLinq()
-        {
-            // Arrange
-            var document = CreateTestDocument();
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = await SUT.DeleteOneAsync<T, TKey>(e => e.Id.Equals(document.Id), PartitionKey);
-            // Assert
-            Assert.True (1 == result);
-            Assert.False(SUT.Any<T, TKey>(e => e.Id.Equals(document.Id), PartitionKey), GetTestName());
-        }
-
-        [Fact]
-        public async Task DeleteManyAsyncLinq()
-        {
-            // Arrange
-            var criteria = $"{GetTestName()}.{DocumentTypeName}";
-            var documents = CreateTestDocuments(5);
-            documents.ForEach(e => e.SomeContent = criteria);
-            SUT.AddMany<T, TKey>(documents);
-            // Act
-            var result = await SUT.DeleteManyAsync<T, TKey>(e => e.SomeContent == criteria, PartitionKey);
-            // Assert
-            Assert.True(5 == result);
-            Assert.False(SUT.Any<T, TKey>(e => e.SomeContent == criteria, PartitionKey), GetTestName());
-        }
-
-        [Fact]
-        public async Task DeleteManyAsync()
-        {
-            // Arrange
-            var criteria = $"{GetTestName()}.{DocumentTypeName}";
-            var documents = CreateTestDocuments(5);
-            documents.ForEach(e => e.SomeContent = criteria);
-            SUT.AddMany<T, TKey>(documents);
-            // Act
-            var result = await SUT.DeleteManyAsync<T, TKey>(documents);
-            // Assert
-            Assert.True(5 == result);
-            Assert.False(SUT.Any<T, TKey>(e => e.SomeContent == criteria, PartitionKey), GetTestName());
-        }
-
-        [Fact]
-        public void DeleteManyLinq()
-        {
-            // Arrange
-            var criteria = $"{GetTestName()}.{DocumentTypeName}";
-            var documents = CreateTestDocuments(5);
-            documents.ForEach(e => e.SomeContent = criteria);
-            SUT.AddMany<T, TKey>(documents);
-            // Act
-            var result = SUT.DeleteMany<T, TKey>(e => e.SomeContent == criteria, PartitionKey);
-            // Assert
-            Assert.True(5 == result);
-            Assert.False(SUT.Any<T, TKey>(e => e.SomeContent == criteria, PartitionKey), GetTestName());
-        }
-
-        [Fact]
-        public void DeleteMany()
-        {
-            // Arrange
-            var criteria = $"{GetTestName()}.{DocumentTypeName}";
-            var documents = CreateTestDocuments(5);
-            documents.ForEach(e => e.SomeContent = criteria);
-            SUT.AddMany<T, TKey>(documents);
-            // Act
-            var result = SUT.DeleteMany<T, TKey>(documents);
-            // Assert
-            Assert.True(5 == result);
-            Assert.False(SUT.Any<T, TKey>(e => e.SomeContent == criteria, PartitionKey), GetTestName());
-        }
-
-        #endregion Delete
-
-        #region Project
-
-        [Fact]
-        public async Task ProjectOneAsync()
-        {
-            // Arrange
-            var someContent = GetContent();
-            var someDate = DateTime.UtcNow;
-            var document = CreateTestDocument();
-            document.SomeContent = someContent;
-            document.Nested.SomeDate = someDate;
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = await SUT.ProjectOneAsync<T, MyTestProjection, TKey>(
-                x => x.Id.Equals(document.Id),
-                x => new MyTestProjection
-                {
-                    SomeContent = x.SomeContent,
-                    SomeDate = x.Nested.SomeDate
-                },
-                PartitionKey);
-            // Assert
-            Assert.True(null != result, GetTestName());
-            Assert.True(someContent == result.SomeContent, GetTestName());
-            Assert.True(someDate.Minute == result.SomeDate.Minute, GetTestName());
-            Assert.True(someDate.Second == result.SomeDate.Second, GetTestName());
-        }
-
-        [Fact]
-        public void ProjectOne()
-        {
-            // Arrange
-            var someContent = GetContent();
-            var someDate = DateTime.UtcNow;
-            var document = CreateTestDocument();
-            document.SomeContent = someContent;
-            document.Nested.SomeDate = someDate;
-            SUT.AddOne<T, TKey>(document);
-            // Act
-            var result = SUT.ProjectOne<T, MyTestProjection, TKey>(
-                x => x.Id.Equals(document.Id),
-                x => new MyTestProjection
-                {
-                    SomeContent = x.SomeContent,
-                    SomeDate = x.Nested.SomeDate
-                },
-                PartitionKey);
-            // Assert
-            Assert.True(null != result, GetTestName());
-            Assert.True(someContent == result.SomeContent, GetTestName());
-            Assert.True(someDate.Minute == result.SomeDate.Minute, GetTestName());
-            Assert.True(someDate.Second == result.SomeDate.Second, GetTestName());
-        }
-
-        [Fact]
-        public async Task ProjectManyAsync()
-        {
-            // Arrange
-            var someContent = GetContent();
-            var someDate = DateTime.UtcNow;
-            var documents = CreateTestDocuments(5);
-            documents.ForEach(e =>
-            {
-                e.SomeContent = someContent;
-                e.Nested.SomeDate = someDate;
-            });
-
-            SUT.AddMany<T, TKey>(documents);
-            // Act
-            var result = await SUT.ProjectManyAsync<T, MyTestProjection, TKey>(
-                x => x.SomeContent == someContent,
-                x => new MyTestProjection
-                {
-                    SomeContent = x.SomeContent,
-                    SomeDate = x.Nested.SomeDate
-                },
-                PartitionKey);
-            // Assert
-            Assert.True(5 == result.Count, GetTestName());
-            Assert.True(someContent == result.First().SomeContent, GetTestName());
-            Assert.True(someDate.Minute == result.First().SomeDate.Minute, GetTestName());
-            Assert.True(someDate.Second == result.First().SomeDate.Second, GetTestName());
-        }
-
-        [Fact]
-        public void ProjectMany()
-        {
-            // Arrange
-            var someContent = GetContent();
-            var someDate = DateTime.UtcNow;
-            var documents = CreateTestDocuments(5);
-            documents.ForEach(e =>
-            {
-                e.SomeContent = someContent;
-                e.Nested.SomeDate = someDate;
-            });
-
-            SUT.AddMany<T, TKey>(documents);
-            // Act
-            var result = SUT.ProjectMany<T, MyTestProjection, TKey>(
-                x => x.SomeContent == someContent,
-                x => new MyTestProjection
-                {
-                    SomeContent = x.SomeContent,
-                    SomeDate = x.Nested.SomeDate
-                },
-                PartitionKey);
-            // Assert
-            Assert.True(5 == result.Count, GetTestName());
-            Assert.True(someContent == result.First().SomeContent, GetTestName());
-            Assert.True(someDate.Minute == result.First().SomeDate.Minute, GetTestName());
-            Assert.True(someDate.Second == result.First().SomeDate.Second, GetTestName());
-        }
-
-        #endregion Project
-
-        #region Test Utils
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        private string GetCurrentMethod()
-        {
-            StackTrace st = new StackTrace();
-            StackFrame sf = st.GetFrame(1);
-
-            return sf.GetMethod().Name;
-        }
-
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        private string GetParentMethod()
-        {
-            StackTrace st = new StackTrace();
-            StackFrame sf = st.GetFrame(2);
-            var method = sf.GetMethod().DeclaringType.Name;
-            return method;
-        }
-
-        private string GetTestName()
-        {
-            return $"{TestClassName}{PartitionKey}.{GetParentMethod()}";
-        }
-
-        private string GetContent()
-        {
-            return $"{TestClassName}{PartitionKey}.{Guid.NewGuid()}.{GetParentMethod()}";
-        }
-
-        private void Cleanup()
-        {
-            // We drop the collection at the end of each test session.
-            if (!string.IsNullOrEmpty(PartitionKey))
-            {
-                SUT.DropTestCollection<T>(PartitionKey);
-            }
-            else
-            {
-                SUT.DropTestCollection<T>();
-            }
-        }
-
-        #endregion Test Utils
-
-    }
-}

CoreIntegrationTests/Infrastructure/MongoDbTestFixture.cs

@@ -5,10 +5,8 @@ using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Linq;
 
-
 namespace CoreIntegrationTests.Infrastructure
 {
-
     public class MongoDbTestFixture<T, TKey> : IDisposable
         where T : IDocument<TKey>, new()
         where TKey : IEquatable<TKey>
@@ -18,19 +16,18 @@ namespace CoreIntegrationTests.Infrastructure
 
         public MongoDbTestFixture()
         {
-            DocsToDelete = new ConcurrentBag<T>();
         }
 
         public string PartitionKey { get; set; }
 
-        public ConcurrentBag<T> DocsToDelete { get; set; }
+        public static ConcurrentBag<T> DocsToDelete { get; set; } = new ConcurrentBag<T>();
 
         public virtual void Dispose()
         {
-            var docIds = DocsToDelete.ToList().Select(e => e.Id);
-            if (docIds.Any())
+
+            if (DocsToDelete.Any())
             {
-                TestRepository.Instance.DeleteMany<T, TKey>(e => docIds.Contains(e.Id));
+                TestRepository.Instance.DeleteMany<T, TKey>(DocsToDelete.ToList());
             }
         }
 
@@ -46,8 +43,9 @@ namespace CoreIntegrationTests.Infrastructure
             var docs = new List<T>();
             for (var i = 0; i < numberOfDocumentsToCreate; i++)
             {
-                docs.Add(new T());
-                DocsToDelete.Add(docs.Last());
+                var doc = new T();
+                docs.Add(doc);
+                DocsToDelete.Add(doc);
             }
             return docs;
         }

CoreIntegrationTests/Infrastructure/TestClasses.cs

@@ -1,5 +1,7 @@
-using MongoDB.Bson.Serialization.Attributes;
+using MongoDB.Bson;
+using MongoDB.Bson.Serialization.Attributes;
 using MongoDbGenericRepository.Models;
+using MongoDbGenericRepository.Utils;
 using System;
 using System.Collections.Generic;
 
@@ -20,6 +22,8 @@ namespace CoreIntegrationTests.Infrastructure
     public class Nested
     {
         public DateTime SomeDate { get; set; }
+        [BsonRepresentation(BsonType.Decimal128)]
+        public decimal SomeAmount { get; set; }
     }
 
     public class Child
@@ -46,7 +50,11 @@ namespace CoreIntegrationTests.Infrastructure
             Children = new List<Child>();
         }
 
+        public int SomeValue { get; set; }
+
         public string SomeContent { get; set; }
+        public string SomeContent2 { get; set; }
+        public string SomeContent3 { get; set; }
 
         public int GroupingKey { get; set; }
 
@@ -74,7 +82,10 @@ namespace CoreIntegrationTests.Infrastructure
             Children = new List<Child>();
         }
 
+        public int GroupingKey { get; set; }
         public string SomeContent { get; set; }
+        public string SomeContent4 { get; set; }
+        public string SomeContent5 { get; set; }
 
         public Nested Nested { get; set; }
 
@@ -82,22 +93,7 @@ namespace CoreIntegrationTests.Infrastructure
 
         public TId Init<TId>()
         {
-            var idTypeName = typeof(TKey).Name;
-            switch (idTypeName)
-            {
-                case "Guid":
-                    return (TId)(object)Guid.NewGuid();
-                case "Int16":
-                    return (TId)(object)GlobalVariables.Random.Next(1, short.MaxValue);
-                case "Int32":
-                    return (TId)(object)GlobalVariables.Random.Next(1, int.MaxValue);
-                case "Int64":
-                    return (TId)(object)(GlobalVariables.Random.NextLong(1, long.MaxValue));
-                case "String":
-                    return (TId)(object)Guid.NewGuid().ToString();
-                default:
-                    throw new NotSupportedException($"{idTypeName} is not supported.");
-            }
+            return IdGenerator.GetId<TId>();
         }
 
         private void InitializeFields()

CoreIntegrationTests/Infrastructure/TestRepository.cs

@@ -1,7 +1,43 @@
-using MongoDbGenericRepository;
+using MongoDB.Bson;
+using MongoDbGenericRepository;
+using System;
 
 namespace CoreIntegrationTests.Infrastructure
 {
+    public interface ITestRepository<TKey> : IBaseMongoRepository<TKey> where TKey : IEquatable<TKey>
+    {
+        void DropTestCollection<TDocument>();
+        void DropTestCollection<TDocument>(string partitionKey);
+    }
+
+    public class TestTKeyRepository<TKey> : BaseMongoRepository<TKey>, ITestRepository<TKey> where TKey : IEquatable<TKey>
+    {
+        const string connectionString = "mongodb://localhost:27017/MongoDbTests";
+        private static readonly ITestRepository<TKey> _instance = new TestTKeyRepository<TKey>(connectionString);
+        /// <inheritdoc />
+        private TestTKeyRepository(string connectionString) : base(connectionString)
+        {
+        }
+
+        public static ITestRepository<TKey> Instance
+        {
+            get
+            {
+                return _instance;
+            }
+        }
+
+        public void DropTestCollection<TDocument>()
+        {
+            MongoDbContext.DropCollection<TDocument>();
+        }
+
+        public void DropTestCollection<TDocument>(string partitionKey)
+        {
+            MongoDbContext.DropCollection<TDocument>(partitionKey);
+        }
+    }
+
     /// <summary>
     /// A singleton implementation of the TestRepository
     /// </summary>

IntegrationTests/App.config

@@ -11,10 +11,6 @@
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
         <assemblyIdentity name="System.Runtime.InteropServices.RuntimeInformation" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
-      </dependentAssembly>
-      <dependentAssembly>
-        <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
         <bindingRedirect oldVersion="0.0.0.0-4.0.2.0" newVersion="4.0.2.0" />
       </dependentAssembly>
     </assemblyBinding>

IntegrationTests/CRUDObjectIdTests.cs

@@ -0,0 +1,19 @@
+using IntegrationTests.Infrastructure;
+using MongoDB.Bson;
+using NUnit.Framework;
+
+namespace IntegrationTests
+{
+    public class ObjectIdTestDocument : TestDoc<ObjectId>
+    {
+    }
+
+    [TestFixture]
+    public class CRUDObjectIdTests : MongoDbTKeyDocumentTestBase<ObjectIdTestDocument, ObjectId>
+    {
+        public override string GetClassName()
+        {
+            return "CRUDObjectIdTests";
+        }
+    }
+}

IntegrationTests/Infrastructure/MongoDBDocumentTestBase.cs

@@ -202,7 +202,7 @@ namespace IntegrationTests.Infrastructure
             SUT.AddOne<T>(document);
             // Act
             var cursor = SUT.GetCursor<T>(x => x.Id.Equals(document.Id), PartitionKey);
-            var count = cursor.Count();
+            var count = cursor.CountDocuments();
             // Assert
             Assert.AreEqual(1, count, GetTestName());
         }

IntegrationTests/Infrastructure/MongoDbTKeyDocumentTestBase.cs

@@ -204,7 +204,7 @@ namespace IntegrationTests.Infrastructure
             SUT.AddOne<T, TKey>(document);
             // Act
             var cursor = SUT.GetCursor<T, TKey>(x => x.Id.Equals(document.Id), PartitionKey);
-            var count = cursor.Count();
+            var count = cursor.CountDocuments();
             // Assert
             Assert.AreEqual(1, count, GetTestName());
         }

IntegrationTests/Infrastructure/TestClasses.cs

@@ -1,5 +1,6 @@
 using MongoDB.Bson.Serialization.Attributes;
 using MongoDbGenericRepository.Models;
+using MongoDbGenericRepository.Utils;
 using System;
 using System.Collections.Generic;
 
@@ -82,22 +83,7 @@ namespace IntegrationTests.Infrastructure
 
         public TId Init<TId>()
         {
-            var idTypeName = typeof(TKey).Name;
-            switch (idTypeName)
-            {
-                case "Guid":
-                    return (TId)(object)Guid.NewGuid();
-                case "Int16":
-                    return (TId)(object)GlobalVariables.Random.Next(1, short.MaxValue);
-                case "Int32":
-                    return (TId)(object)GlobalVariables.Random.Next(1, int.MaxValue);
-                case "Int64":
-                    return (TId)(object)(GlobalVariables.Random.NextLong(1, long.MaxValue));
-                case "String":
-                    return (TId)(object)Guid.NewGuid().ToString();
-                default:
-                    throw new NotSupportedException($"{idTypeName} is not supported.");
-            }
+            return IdGenerator.GetId<TId>();
         }
 
         private void InitializeFields()

IntegrationTests/Infrastructure/TestRepository.cs

@@ -1,4 +1,9 @@
-using MongoDbGenericRepository;
+using MongoDB.Driver;
+using MongoDbGenericRepository;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
 
 namespace IntegrationTests.Infrastructure
 {
@@ -18,5 +23,20 @@ namespace IntegrationTests.Infrastructure
         {
             MongoDbContext.DropCollection<TDocument>(partitionKey);
         }
+
+        /// <summary>
+        /// Gets the max of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <returns></returns>
+        public async Task<TDocument> GetByMaxAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> orderByDescending)
+            where TDocument : IDocument<TKey>
+            where TKey : System.IEquatable<TKey>
+        {
+            return await GetCollection<TDocument, TKey>().Find(Builders<TDocument>.Filter.Where(filter))
+                                                         .SortByDescending(orderByDescending)
+                                                         .FirstOrDefaultAsync();
+        }
     }
 }

IntegrationTests/IntegrationTests.csproj

@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\packages\NUnit3TestAdapter.3.15.1\build\net35\NUnit3TestAdapter.props" Condition="Exists('..\packages\NUnit3TestAdapter.3.15.1\build\net35\NUnit3TestAdapter.props')" />
+  <Import Project="..\packages\NUnit.3.12.0\build\NUnit.props" Condition="Exists('..\packages\NUnit.3.12.0\build\NUnit.props')" />
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -11,6 +13,8 @@
     <AssemblyName>IntegrationTests</AssemblyName>
     <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -30,37 +34,48 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="DnsClient, Version=1.0.7.0, Culture=neutral, PublicKeyToken=4574bb5573c51424, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDbGenericRepository.1.3.5\lib\net45\DnsClient.dll</HintPath>
+    <Reference Include="Crc32C.NET, Version=1.0.5.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\Crc32C.NET.1.0.5.0\lib\net20\Crc32C.NET.dll</HintPath>
     </Reference>
-    <Reference Include="MongoDB.Bson, Version=2.5.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDbGenericRepository.1.3.5\lib\net45\MongoDB.Bson.dll</HintPath>
+    <Reference Include="DnsClient, Version=1.2.0.0, Culture=neutral, PublicKeyToken=4574bb5573c51424, processorArchitecture=MSIL">
+      <HintPath>..\packages\DnsClient.1.2.0\lib\net45\DnsClient.dll</HintPath>
     </Reference>
-    <Reference Include="MongoDB.Driver, Version=2.5.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDbGenericRepository.1.3.5\lib\net45\MongoDB.Driver.dll</HintPath>
+    <Reference Include="MongoDB.Bson, Version=2.9.3.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDB.Bson.2.9.3\lib\net452\MongoDB.Bson.dll</HintPath>
     </Reference>
-    <Reference Include="MongoDB.Driver.Core, Version=2.5.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDbGenericRepository.1.3.5\lib\net45\MongoDB.Driver.Core.dll</HintPath>
+    <Reference Include="MongoDB.Driver, Version=2.9.3.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDB.Driver.2.9.3\lib\net452\MongoDB.Driver.dll</HintPath>
     </Reference>
-    <Reference Include="MongoDbGenericRepository, Version=1.0.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDbGenericRepository.1.3.5\lib\net45\MongoDbGenericRepository.dll</HintPath>
+    <Reference Include="MongoDB.Driver.Core, Version=2.9.3.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDB.Driver.Core.2.9.3\lib\net452\MongoDB.Driver.Core.dll</HintPath>
     </Reference>
-    <Reference Include="nunit.framework, Version=3.9.0.0, Culture=neutral, PublicKeyToken=2638cd05610744eb, processorArchitecture=MSIL">
-      <HintPath>..\packages\NUnit.3.9.0\lib\net45\nunit.framework.dll</HintPath>
+    <Reference Include="MongoDbGenericRepository, Version=1.4.5.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\MongoDbGenericRepository.1.4.5\lib\net452\MongoDbGenericRepository.dll</HintPath>
+    </Reference>
+    <Reference Include="nunit.framework, Version=3.12.0.0, Culture=neutral, PublicKeyToken=2638cd05610744eb, processorArchitecture=MSIL">
+      <HintPath>..\packages\NUnit.3.12.0\lib\net45\nunit.framework.dll</HintPath>
+    </Reference>
+    <Reference Include="SharpCompress, Version=0.23.0.0, Culture=neutral, PublicKeyToken=afb0a02973931d96, processorArchitecture=MSIL">
+      <HintPath>..\packages\SharpCompress.0.23.0\lib\net45\SharpCompress.dll</HintPath>
+    </Reference>
+    <Reference Include="Snappy.NET, Version=1.1.1.8, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\Snappy.NET.1.1.1.8\lib\net45\Snappy.NET.dll</HintPath>
     </Reference>
     <Reference Include="System" />
-    <Reference Include="System.Buffers, Version=4.0.1.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDbGenericRepository.1.3.5\lib\net45\System.Buffers.dll</HintPath>
+    <Reference Include="System.Buffers, Version=4.0.2.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Buffers.4.4.0\lib\netstandard2.0\System.Buffers.dll</HintPath>
     </Reference>
     <Reference Include="System.Configuration" />
     <Reference Include="System.Core" />
     <Reference Include="Microsoft.CSharp" />
-    <Reference Include="System.Runtime.InteropServices.RuntimeInformation, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <HintPath>..\packages\MongoDbGenericRepository.1.3.5\lib\net45\System.Runtime.InteropServices.RuntimeInformation.dll</HintPath>
+    <Reference Include="System.Runtime.InteropServices.RuntimeInformation, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>..\packages\System.Runtime.InteropServices.RuntimeInformation.4.3.0\lib\net45\System.Runtime.InteropServices.RuntimeInformation.dll</HintPath>
+      <Private>True</Private>
       <Private>True</Private>
     </Reference>
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="CRUDObjectIdTests.cs" />
     <Compile Include="CRUDPartitionedTests.cs" />
     <Compile Include="CRUDTKeyPartitionedCollectionNameAttributeTests.cs" />
     <Compile Include="CRUDTests.cs" />
@@ -87,4 +102,10 @@
     <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\packages\NUnit3TestAdapter.3.15.1\build\net35\NUnit3TestAdapter.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\NUnit3TestAdapter.3.15.1\build\net35\NUnit3TestAdapter.props'))" />
+  </Target>
 </Project>

IntegrationTests/packages.config

@@ -1,12 +1,16 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="DnsClient" version="1.0.7" targetFramework="net461" />
-  <package id="MongoDB.Bson" version="2.5.0" targetFramework="net461" />
-  <package id="MongoDB.Driver" version="2.5.0" targetFramework="net461" />
-  <package id="MongoDB.Driver.Core" version="2.5.0" targetFramework="net461" />
-  <package id="MongoDbGenericRepository" version="1.3.5" targetFramework="net461" />
-  <package id="NUnit" version="3.9.0" targetFramework="net461" />
-  <package id="NUnit.ConsoleRunner" version="3.7.0" targetFramework="net461" />
-  <package id="System.Buffers" version="4.3.0" targetFramework="net461" />
-  <package id="System.Runtime.InteropServices.RuntimeInformation" version="4.0.0" targetFramework="net461" />
+  <package id="Crc32C.NET" version="1.0.5.0" targetFramework="net461" />
+  <package id="DnsClient" version="1.2.0" targetFramework="net461" />
+  <package id="MongoDB.Bson" version="2.9.3" targetFramework="net461" />
+  <package id="MongoDB.Driver" version="2.9.3" targetFramework="net461" />
+  <package id="MongoDB.Driver.Core" version="2.9.3" targetFramework="net461" />
+  <package id="MongoDbGenericRepository" version="1.4.5" targetFramework="net461" />
+  <package id="NUnit" version="3.12.0" targetFramework="net461" />
+  <package id="NUnit.ConsoleRunner" version="3.10.0" targetFramework="net461" />
+  <package id="NUnit3TestAdapter" version="3.15.1" targetFramework="net461" />
+  <package id="SharpCompress" version="0.23.0" targetFramework="net461" />
+  <package id="Snappy.NET" version="1.1.1.8" targetFramework="net461" />
+  <package id="System.Buffers" version="4.4.0" targetFramework="net461" />
+  <package id="System.Runtime.InteropServices.RuntimeInformation" version="4.3.0" targetFramework="net461" />
 </packages>

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Alexandre SPIESER
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

MongoDbGenericRepository.v3.ncrunchsolution.user

@@ -1,5 +0,0 @@
-<SolutionConfiguration>
-  <Settings>
-    <CurrentEngineMode>Run all tests automatically [Global]</CurrentEngineMode>
-  </Settings>
-</SolutionConfiguration>

MongoDbGenericRepository/Abstractions/IBaseMongoRepository.cs

@@ -1,609 +1,22 @@
 using MongoDB.Driver;
+using MongoDbGenericRepository.Models;
 using System;
 using System.Collections.Generic;
-using System.Threading.Tasks;
 using System.Linq.Expressions;
-using MongoDbGenericRepository.Models;
-using System.Linq;
+using System.Threading.Tasks;
 
 namespace MongoDbGenericRepository
 {
-
     /// <summary>
-    /// The IBaseMongoRepository exposes the CRUD functionality of the BaseMongoRepository.
+    /// The IBaseMongoRepository interface exposes the CRUD functionality of the BaseMongoRepository.
     /// </summary>
-    public interface IBaseMongoRepository : IReadOnlyMongoRepository
+    public interface IBaseMongoRepository : 
+        IReadOnlyMongoRepository, 
+        IBaseMongoRepository_Create, 
+        IBaseMongoRepository_Update, 
+        IBaseMongoRepository_Delete, 
+        IBaseMongoRepository_Index
     {
-        #region Create
-
-        /// <summary>
-        /// Asynchronously adds a document to the collection.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="document">The document you want to add.</param>
-        Task AddOneAsync<TDocument>(TDocument document) where TDocument : IDocument;
-
-        /// <summary>
-        /// Adds a document to the collection.
-        /// Populates the Id and AddedAtUtc fields if necessary.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="document">The document you want to add.</param>
-        void AddOne<TDocument>(TDocument document) where TDocument : IDocument;
-
-        /// <summary>
-        /// Asynchronously adds a list of documents to the collection.
-        /// Populates the Id and AddedAtUtc fields if necessary.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="documents">The document you want to add.</param>
-        Task AddManyAsync<TDocument>(IEnumerable<TDocument> documents) where TDocument : IDocument;
-
-        /// <summary>
-        /// Adds a list of documents to the collection.
-        /// Populates the Id and AddedAtUtc fields if necessary.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="documents">The document you want to add.</param>
-        void AddMany<TDocument>(IEnumerable<TDocument> documents) where TDocument : IDocument;
-
-        #endregion
-
-        #region Create TKey
-
-        /// <summary>
-        /// Asynchronously adds a document to the collection.
-        /// Populates the Id and AddedAtUtc fields if necessary.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="document">The document you want to add.</param>
-        Task AddOneAsync<TDocument, TKey>(TDocument document)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Adds a document to the collection.
-        /// Populates the Id and AddedAtUtc fields if necessary.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="document">The document you want to add.</param>
-        void AddOne<TDocument, TKey>(TDocument document)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Asynchronously adds a list of documents to the collection.
-        /// Populates the Id and AddedAtUtc fields if necessary.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="documents">The documents you want to add.</param>
-        Task AddManyAsync<TDocument, TKey>(IEnumerable<TDocument> documents)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Adds a list of documents to the collection.
-        /// Populates the Id and AddedAtUtc fields if necessary.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="documents">The documents you want to add.</param>
-        void AddMany<TDocument, TKey>(IEnumerable<TDocument> documents)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        #endregion
-
-        #region Update
-
-        /// <summary>
-        /// Asynchronously Updates a document.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
-        Task<bool> UpdateOneAsync<TDocument>(TDocument modifiedDocument) where TDocument : IDocument;
-
-        /// <summary>
-        /// Updates a document.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
-        bool UpdateOne<TDocument>(TDocument modifiedDocument) where TDocument : IDocument;
-
-        /// <summary>
-        /// Updates the property field with the given value update a property field in entities.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TField">The type of the field.</typeparam>
-        /// <param name="filter">The document filter.</param>
-        /// <param name="field">The field selector.</param>
-        /// <param name="value">The new value of the property field.</param>
-        /// <param name="partitionKey">The value of the partition key.</param>
-        bool UpdateOne<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
-            where TDocument : IDocument;
-
-        /// <summary>
-        /// Updates the property field with the given value update a property field in entities.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TField">The type of the field.</typeparam>
-        /// <param name="filter">The document filter.</param>
-        /// <param name="field">The field selector.</param>
-        /// <param name="value">The new value of the property field.</param>
-        /// <param name="partitionKey">The value of the partition key.</param>
-        Task<bool> UpdateOneAsync<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
-            where TDocument : IDocument;
-
-        /// <summary>
-        /// Updates the property field with the given value update a property field in entities.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TField">The type of the field.</typeparam>
-        /// <param name="documentToModify">The document you want to modify.</param>
-        /// <param name="field">The field selector.</param>
-        /// <param name="value">The new value of the property field.</param>
-        bool UpdateOne<TDocument, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
-            where TDocument : IDocument;
-
-        /// <summary>
-        /// Updates the property field with the given value update a property field in entities.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TField">The type of the field.</typeparam>
-        /// <param name="documentToModify">The document you want to modify.</param>
-        /// <param name="field">The field selector.</param>
-        /// <param name="value">The new value of the property field.</param>
-        Task<bool> UpdateOneAsync<TDocument, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
-            where TDocument : IDocument;
-
-        /// <summary>
-        /// For the entity selected by the filter, updates the property field with the given value.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TField">The type of the field.</typeparam>
-        /// <param name="filter">The document filter.</param>
-        /// <param name="field">The field selector.</param>
-        /// <param name="value">The new value of the property field.</param>
-        bool UpdateOne<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
-            where TDocument : IDocument;
-
-        /// <summary>
-        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="documentToModify">The document you want to modify.</param>
-        /// <param name="update">The update definition for the document.</param>
-        Task<bool> UpdateOneAsync<TDocument>(TDocument documentToModify, UpdateDefinition<TDocument> update)
-            where TDocument : IDocument;
-
-        /// <summary>
-        /// For the entity selected by the filter, updates the property field with the given value.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <typeparam name="TField">The type of the field.</typeparam>
-        /// <param name="filter">The document filter.</param>
-        /// <param name="field">The field selector.</param>
-        /// <param name="value">The new value of the property field.</param>
-        Task<bool> UpdateOneAsync<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
-            where TDocument : IDocument;
-
-        /// <summary>
-        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="documentToModify">The document you want to modify.</param>
-        /// <param name="update">The update definition for the document.</param>
-        bool UpdateOne<TDocument>(TDocument documentToModify, UpdateDefinition<TDocument> update)
-            where TDocument : IDocument;
-
-        #endregion
-
-        #region Update TKey
-
-        /// <summary>
-        /// Asynchronously Updates a document.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
-        Task<bool> UpdateOneAsync<TDocument, TKey>(TDocument modifiedDocument)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Updates a document.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
-        bool UpdateOne<TDocument, TKey>(TDocument modifiedDocument)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="documentToModify">The document you want to modify.</param>
-        /// <param name="update">The update definition for the document.</param>
-        Task<bool> UpdateOneAsync<TDocument, TKey>(TDocument documentToModify, UpdateDefinition<TDocument> update)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="documentToModify">The document you want to modify.</param>
-        /// <param name="update">The update definition for the document.</param>
-        bool UpdateOne<TDocument, TKey>(TDocument documentToModify, UpdateDefinition<TDocument> update)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// For the entity selected by the filter, updates the property field with the given value..
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <typeparam name="TField">The type of the field.</typeparam>
-        /// <param name="filter">The document filter.</param>
-        /// <param name="field">The field selector.</param>
-        /// <param name="value">The new value of the property field.</param>
-        bool UpdateOne<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Updates the property field with the given value update a property field in entities.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <typeparam name="TField">The type of the field.</typeparam>
-        /// <param name="documentToModify">The document you want to modify.</param>
-        /// <param name="field">The field selector.</param>
-        /// <param name="value">The new value of the property field.</param>
-        Task<bool> UpdateOneAsync<TDocument, TKey, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// For the entity selected by the filter, updates the property field with the given value.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <typeparam name="TField">The type of the field.</typeparam>
-        /// <param name="filter">The document filter.</param>
-        /// <param name="field">The field selector.</param>
-        /// <param name="value">The new value of the property field.</param>
-        Task<bool> UpdateOneAsync<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Updates the property field with the given value update a property field in entities.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <typeparam name="TField">The type of the field.</typeparam>
-        /// <param name="documentToModify">The document you want to modify.</param>
-        /// <param name="field">The field selector.</param>
-        /// <param name="value">The new value of the property field.</param>
-        bool UpdateOne<TDocument, TKey, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Updates the property field with the given value update a property field in entities.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <typeparam name="TField">The type of the field.</typeparam>
-        /// <param name="filter">The document filter.</param>
-        /// <param name="field">The field selector.</param>
-        /// <param name="value">The new value of the property field.</param>
-        /// <param name="partitionKey">The value of the partition key.</param>
-        Task<bool> UpdateOneAsync<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Updates the property field with the given value update a property field in entities.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <typeparam name="TField">The type of the field.</typeparam>
-        /// <param name="filter">The document filter.</param>
-        /// <param name="field">The field selector.</param>
-        /// <param name="value">The new value of the property field.</param>
-        /// <param name="partitionKey">The value of the partition key.</param>
-        bool UpdateOne<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        #endregion
-
-        #region Delete
-
-        /// <summary>
-        /// Asynchronously deletes a document.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="document">The document you want to delete.</param>
-        /// <returns>The number of documents deleted.</returns>
-        Task<long> DeleteOneAsync<TDocument>(TDocument document) where TDocument : IDocument;
-
-        /// <summary>
-        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        /// <returns>The number of documents deleted.</returns>
-        Task<long> DeleteOneAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Deletes a document.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="document">The document you want to delete.</param>
-        /// <returns>The number of documents deleted.</returns>
-        long DeleteOne<TDocument>(TDocument document) where TDocument : IDocument;
-
-        /// <summary>
-        /// Deletes a document matching the condition of the LINQ expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        /// <returns>The number of documents deleted.</returns>
-        long DeleteOne<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Asynchronously deletes the documents matching the condition of the LINQ expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        /// <returns>The number of documents deleted.</returns>
-        Task<long> DeleteManyAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Asynchronously deletes a list of documents.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="documents">The list of documents to delete.</param>
-        /// <returns>The number of documents deleted.</returns>
-        Task<long> DeleteManyAsync<TDocument>(IEnumerable<TDocument> documents) where TDocument : IDocument;
-
-        /// <summary>
-        /// Deletes a list of documents.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="documents">The list of documents to delete.</param>
-        /// <returns>The number of documents deleted.</returns>
-        long DeleteMany<TDocument>(IEnumerable<TDocument> documents) where TDocument : IDocument;
-
-        /// <summary>
-        /// Deletes the documents matching the condition of the LINQ expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        /// <returns>The number of documents deleted.</returns>
-        long DeleteMany<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument;
-
-        #endregion
-
-        #region Delete TKey
-
-        /// <summary>
-        /// Deletes a document.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="document">The document you want to delete.</param>
-        /// <returns>The number of documents deleted.</returns>
-        long DeleteOne<TDocument, TKey>(TDocument document)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="document">The document you want to delete.</param>
-        /// <returns>The number of documents deleted.</returns>
-        Task<long> DeleteOneAsync<TDocument, TKey>(TDocument document)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Deletes a document matching the condition of the LINQ expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        /// <returns>The number of documents deleted.</returns>
-        long DeleteOne<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        /// <returns>The number of documents deleted.</returns>
-        Task<long> DeleteOneAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Asynchronously deletes the documents matching the condition of the LINQ expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        /// <returns>The number of documents deleted.</returns>
-        Task<long> DeleteManyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Asynchronously deletes a list of documents.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="documents">The list of documents to delete.</param>
-        /// <returns>The number of documents deleted.</returns>
-        Task<long> DeleteManyAsync<TDocument, TKey>(IEnumerable<TDocument> documents)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Deletes a list of documents.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="documents">The list of documents to delete.</param>
-        /// <returns>The number of documents deleted.</returns>
-        long DeleteMany<TDocument, TKey>(IEnumerable<TDocument> documents)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Deletes the documents matching the condition of the LINQ expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        /// <returns>The number of documents deleted.</returns>
-        long DeleteMany<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        #endregion
-
-        #region Project
-
-        /// <summary>
-        /// Asynchronously returns a projected document matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
-        /// <param name="filter"></param>
-        /// <param name="projection">The projection expression.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        Task<TProjection> ProjectOneAsync<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
-                                        where TDocument : IDocument
-                                        where TProjection : class;
-
-        /// <summary>
-        /// Asynchronously returns a projected document matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
-        /// <param name="filter"></param>
-        /// <param name="projection">The projection expression.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        Task<TProjection> ProjectOneAsync<TDocument, TProjection, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>
-            where TProjection : class;
-
-        /// <summary>
-        /// Returns a projected document matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
-        /// <param name="filter"></param>
-        /// <param name="projection">The projection expression.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        TProjection ProjectOne<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
-                                        where TDocument : IDocument
-                                        where TProjection : class;
-
-        /// <summary>
-        /// Returns a projected document matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
-        /// <param name="filter"></param>
-        /// <param name="projection">The projection expression.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        TProjection ProjectOne<TDocument, TProjection, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
-                                        where TDocument : IDocument<TKey>
-                                        where TKey : IEquatable<TKey>
-                                        where TProjection : class;
-
-        /// <summary>
-        /// Asynchronously returns a list of projected documents matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
-        /// <param name="filter"></param>
-        /// <param name="projection">The projection expression.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        Task<List<TProjection>> ProjectManyAsync<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
-                                        where TDocument : IDocument
-                                        where TProjection : class;
-
-        /// <summary>
-        /// Asynchronously returns a list of projected documents matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
-        /// <param name="filter"></param>
-        /// <param name="projection">The projection expression.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        Task<List<TProjection>> ProjectManyAsync<TDocument, TProjection, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
-                                        where TDocument : IDocument<TKey>
-                                        where TKey : IEquatable<TKey>
-                                        where TProjection : class;
-
-        /// <summary>
-        /// Asynchronously returns a list of projected documents matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
-        /// <param name="filter"></param>
-        /// <param name="projection">The projection expression.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        List<TProjection> ProjectMany<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
-                                        where TDocument : IDocument
-                                        where TProjection : class;
-
-        /// <summary>
-        /// Asynchronously returns a list of projected documents matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
-        /// <param name="filter"></param>
-        /// <param name="projection">The projection expression.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        List<TProjection> ProjectMany<TDocument, TProjection, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>
-            where TProjection : class;
-
-        #endregion
-
         /// <summary>
         /// Asynchronously returns a paginated list of the documents matching the filter condition.
         /// </summary>
@@ -651,45 +64,6 @@ namespace MongoDbGenericRepository
         Task<TDocument> GetAndUpdateOne<TDocument, TKey>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> update, FindOneAndUpdateOptions<TDocument, TDocument> options)
                                         where TDocument : IDocument<TKey>
                                         where TKey : IEquatable<TKey>;
-
-        #region Grouping
-
-        /// <summary>
-        /// Groups a collection of documents given a grouping criteria, 
-        /// and returns a list of projected documents.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TGroupKey">The type of the grouping criteria.</typeparam>
-        /// <typeparam name="TProjection">The type of the projected group.</typeparam>
-        /// <param name="groupingCriteria">The grouping criteria.</param>
-        /// <param name="groupProjection">The projected group result.</param>
-        /// <param name="partitionKey">The partition key of your document, if any.</param>
-        List<TProjection> GroupBy<TDocument, TGroupKey, TProjection>(
-            Expression<Func<TDocument, TGroupKey>> groupingCriteria,
-            Expression<Func<IGrouping<TGroupKey, TDocument>, TProjection>> groupProjection,
-            string partitionKey = null)
-            where TDocument : IDocument
-            where TProjection : class, new();
-
-        /// <summary>
-        /// Groups filtered a collection of documents given a grouping criteria, 
-        /// and returns a dictionary of listed document groups with keys having the different values of the grouping criteria.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TGroupKey">The type of the grouping criteria.</typeparam>
-        /// <typeparam name="TProjection">The type of the projected group.</typeparam>
-        /// <param name="filter"></param>
-        /// <param name="selector">The grouping criteria.</param>
-        /// <param name="projection">The projected group result.</param>
-        /// <param name="partitionKey">The partition key of your document, if any.</param>
-        List<TProjection> GroupBy<TDocument, TGroupKey, TProjection>(Expression<Func<TDocument, bool>> filter,
-                                                       Expression<Func<TDocument, TGroupKey>> selector,
-                                                       Expression<Func<IGrouping<TGroupKey, TDocument>, TProjection>> projection,
-                                                       string partitionKey = null)
-                                                       where TDocument : IDocument
-                                                       where TProjection : class, new();
-
-        #endregion
     }
 
 }

MongoDbGenericRepository/Abstractions/IBaseMongoRepository_Update.cs

@@ -0,0 +1,242 @@
+using MongoDB.Driver;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository
+{
+    /// <summary>
+    /// The IBaseMongoRepository_Update interface exposing update functionality for documents with Guid Ids.
+    /// </summary>
+    public interface IBaseMongoRepository_Update : IBaseMongoRepository_Update<Guid>
+    {
+        /// <summary>
+        /// Asynchronously Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        Task<bool> UpdateOneAsync<TDocument, TKey>(TDocument modifiedDocument)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        bool UpdateOne<TDocument, TKey>(TDocument modifiedDocument)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        Task<bool> UpdateOneAsync<TDocument, TKey>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        bool UpdateOne<TDocument, TKey>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// For the entity selected by the filter, updates the property field with the given value..
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        bool UpdateOne<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        Task<bool> UpdateOneAsync<TDocument, TKey, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// For the entity selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        Task<bool> UpdateOneAsync<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        bool UpdateOne<TDocument, TKey, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        Task<bool> UpdateOneAsync<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        bool UpdateOne<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        Task<long> UpdateManyAsync<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        Task<long> UpdateManyAsync<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        Task<long> UpdateManyAsync<TDocument, TKey>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        Task<long> UpdateManyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        long UpdateMany<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        long UpdateMany<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        long UpdateMany<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        long UpdateMany<TDocument, TKey>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+    }
+}

MongoDbGenericRepository/Abstractions/IBaseMongoRepository_Update_ClientSession.cs

@@ -0,0 +1,169 @@
+using System;
+using System.Linq.Expressions;
+using System.Threading;
+using System.Threading.Tasks;
+using MongoDB.Driver;
+using MongoDbGenericRepository.Models;
+
+namespace MongoDbGenericRepository.DataAccess.Update
+{
+    /// <summary>
+    /// The IBaseMongoRepository_Update_ClientSession interface exposing update functionality with a IClientSessionHandle.
+    /// </summary>
+    public interface IBaseMongoRepository_Update_ClientSession
+    {
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="filter">The filter for the update.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="partitionKey">The optional partition key.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        bool UpdateOne<TDocument, TKey, TField>(IClientSessionHandle session, Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="filter">The filter for the update.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="partitionKey">The optional partition key.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        bool UpdateOne<TDocument, TKey, TField>(IClientSessionHandle session, FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="documentToModify">The document to modify.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        bool UpdateOne<TDocument, TKey, TField>(IClientSessionHandle session, TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        bool UpdateOne<TDocument, TKey>(IClientSessionHandle session, TDocument modifiedDocument, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="documentToModify">The document to modify.</param>
+        /// <param name="update">The update definition.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        bool UpdateOne<TDocument, TKey>(IClientSessionHandle session, TDocument documentToModify, UpdateDefinition<TDocument> update, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="filter">The filter for the update.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="partitionKey">The optional partition key.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        Task<bool> UpdateOneAsync<TDocument, TKey, TField>(IClientSessionHandle session, Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="filter">The filter for the update.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="partitionKey">The optional partition key.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns></returns>
+        Task<bool> UpdateOneAsync<TDocument, TKey, TField>(IClientSessionHandle session, FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param> 
+        /// <param name="documentToModify">The document to modify.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        Task<bool> UpdateOneAsync<TDocument, TKey, TField>(IClientSessionHandle session, TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        Task<bool> UpdateOneAsync<TDocument, TKey>(IClientSessionHandle session, TDocument modifiedDocument, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="documentToModify">The document to modify.</param>
+        /// <param name="update">The update definition.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        Task<bool> UpdateOneAsync<TDocument, TKey>(IClientSessionHandle session, TDocument documentToModify, UpdateDefinition<TDocument> update, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+    }
+}

MongoDbGenericRepository/Abstractions/IBaseReadOnlyRepository.cs

@@ -0,0 +1,502 @@
+using MongoDB.Driver;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository
+{
+    /// <summary>
+    /// The IBaseReadOnlyRepository exposes the generic Read Only functionality of the BaseMongoRepository.
+    /// </summary>
+    public interface IBaseReadOnlyRepository
+    {
+        /// <summary>
+        /// The connection string.
+        /// </summary>
+        string ConnectionString { get; }
+
+        /// <summary>
+        /// The database name.
+        /// </summary>
+        string DatabaseName { get; }
+
+        #region Read TKey
+
+        /// <summary>
+        /// Asynchronously returns one document given its id.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="id">The Id of the document you want to get.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        Task<TDocument> GetByIdAsync<TDocument, TKey>(TKey id, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Returns one document given its id.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="id">The Id of the document you want to get.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        TDocument GetById<TDocument, TKey>(TKey id, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Asynchronously returns one document given an expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        Task<TDocument> GetOneAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Returns one document given an expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        TDocument GetOne<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Returns a collection cursor.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        IFindFluent<TDocument, TDocument> GetCursor<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+
+        /// <summary>
+        /// Returns true if any of the document of the collection matches the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        Task<bool> AnyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Returns true if any of the document of the collection matches the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        bool Any<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Asynchronously returns a list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        Task<List<TDocument>> GetAllAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Returns a list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        List<TDocument> GetAll<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Asynchronously counts how many documents match the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partitionKey</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        Task<long> CountAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Counts how many documents match the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partitionKey</param>
+        long Count<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        #endregion
+
+        #region Min / Max
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by descending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        Task<TDocument> GetByMaxAsync<TDocument, TKey>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, object>> maxValueSelector,
+            string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="orderByDescending">A property selector to order by descending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        TDocument GetByMax<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> orderByDescending, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Gets the document with the minimum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector for the minimum value you are looking for.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        Task<TDocument> GetByMinAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, object>> minValueSelector,
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Gets the document with the minimum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector for the minimum value you are looking for.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        TDocument GetByMin<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> minValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Gets the maximum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector for the maximum value you are looking for.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        Task<TValue> GetMaxValueAsync<TDocument, TKey, TValue>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, TValue>> maxValueSelector,
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Gets the maximum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        TValue GetMaxValue<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> maxValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Gets the minimum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        Task<TValue> GetMinValueAsync<TDocument, TKey, TValue>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, TValue>> minValueSelector,
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Gets the minimum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        TValue GetMinValue<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> minValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        #endregion
+
+        #region Sum
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        Task<int> SumByAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, int>> selector,
+                                                       string partitionKey = null,
+                                                       CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        int SumBy<TDocument, TKey>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, int>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        Task<decimal> SumByAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, decimal>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        decimal SumBy<TDocument, TKey>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, decimal>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        #endregion Sum
+
+        #region Project TKey
+
+        /// <summary>
+        /// Asynchronously returns a projected document matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        Task<TProjection> ProjectOneAsync<TDocument, TProjection, TKey>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, TProjection>> projection,
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class;
+
+        /// <summary>
+        /// Returns a projected document matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter"></param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        TProjection ProjectOne<TDocument, TProjection, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+                                        where TDocument : IDocument<TKey>
+                                        where TKey : IEquatable<TKey>
+                                        where TProjection : class;
+
+        /// <summary>
+        /// Asynchronously returns a list of projected documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        Task<List<TProjection>> ProjectManyAsync<TDocument, TProjection, TKey>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, TProjection>> projection,
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class;
+
+        /// <summary>
+        /// Asynchronously returns a list of projected documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter"></param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        List<TProjection> ProjectMany<TDocument, TProjection, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class;
+
+        #endregion
+
+        #region Group By
+
+        /// <summary>
+        /// Groups filtered a collection of documents given a grouping criteria, 
+        /// and returns a dictionary of listed document groups with keys having the different values of the grouping criteria.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TGroupKey">The type of the grouping criteria.</typeparam>
+        /// <typeparam name="TProjection">The type of the projected group.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="groupingCriteria">The grouping criteria.</param>
+        /// <param name="groupProjection">The projected group result.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        List<TProjection> GroupBy<TDocument, TGroupKey, TProjection, TKey>(
+            Expression<Func<TDocument, TGroupKey>> groupingCriteria,
+            Expression<Func<IGrouping<TGroupKey, TDocument>, TProjection>> groupProjection,
+            string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class, new();
+
+        /// <summary>
+        /// Groups filtered a collection of documents given a grouping criteria, 
+        /// and returns a dictionary of listed document groups with keys having the different values of the grouping criteria.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TGroupKey">The type of the grouping criteria.</typeparam>
+        /// <typeparam name="TProjection">The type of the projected group.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="groupingCriteria">The grouping criteria.</param>
+        /// <param name="groupProjection">The projected group result.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        List<TProjection> GroupBy<TDocument, TGroupKey, TProjection, TKey>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, TGroupKey>> groupingCriteria,
+            Expression<Func<IGrouping<TGroupKey, TDocument>, TProjection>> groupProjection,
+            string partitionKey = null)
+                where TDocument : IDocument<TKey>
+                where TKey : IEquatable<TKey>
+                where TProjection : class, new();
+
+        #endregion Group By
+
+        #region Pagination
+
+        /// <summary>
+        /// Asynchronously returns a paginated list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="sortSelector">The property selector.</param>
+        /// <param name="ascending">Order of the sorting.</param>
+        /// <param name="skipNumber">The number of documents you want to skip. Default value is 0.</param>
+        /// <param name="takeNumber">The number of documents you want to take. Default value is 50.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        Task<List<TDocument>> GetSortedPaginatedAsync<TDocument, TKey>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, object>> sortSelector,
+            bool ascending = true,
+            int skipNumber = 0,
+            int takeNumber = 50,
+            string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Asynchronously returns a paginated list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="sortDefinition">The sort definition.</param>
+        /// <param name="skipNumber">The number of documents you want to skip. Default value is 0.</param>
+        /// <param name="takeNumber">The number of documents you want to take. Default value is 50.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        Task<List<TDocument>> GetSortedPaginatedAsync<TDocument, TKey>(
+            Expression<Func<TDocument, bool>> filter,
+            SortDefinition<TDocument> sortDefinition,
+            int skipNumber = 0,
+            int takeNumber = 50,
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        #endregion Pagination
+    }
+}

MongoDbGenericRepository/Abstractions/IMongoDbContext.cs

@@ -24,29 +24,13 @@ namespace MongoDbGenericRepository
         /// </summary>
         /// <typeparam name="TDocument"></typeparam>
         /// <param name="partitionKey">The value of the partition key.</param>
-        IMongoCollection<TDocument> GetCollection<TDocument>(string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Returns a collection for a document type that has a partition key.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="partitionKey">The value of the partition key.</param>
-        IMongoCollection<TDocument> GetCollection<TDocument, TKey>(string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Drops a collection, use very carefully.
-        /// </summary>
-        /// <typeparam name="TDocument"></typeparam>
-        void DropCollection<TDocument>();
+        IMongoCollection<TDocument> GetCollection<TDocument>(string partitionKey = null);
 
         /// <summary>
         /// Drops a collection having a partitionkey, use very carefully.
         /// </summary>
         /// <typeparam name="TDocument"></typeparam>
-        void DropCollection<TDocument>(string partitionKey);
+        void DropCollection<TDocument>(string partitionKey = null);
 
         /// <summary>
         /// Sets the Guid representation of the MongoDb Driver.

MongoDbGenericRepository/Abstractions/IReadOnlyMongoRepository.TKey.cs

@@ -0,0 +1,381 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+using MongoDB.Driver;
+using MongoDbGenericRepository.Models;
+
+namespace MongoDbGenericRepository
+{
+    public interface IReadOnlyMongoRepository<TKey> where TKey : IEquatable<TKey>
+    {
+        #region Read
+
+        /// <summary>
+        /// Asynchronously returns one document given its id.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="id">The Id of the document you want to get.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        Task<TDocument> GetByIdAsync<TDocument>(TKey id, string partitionKey = null) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Returns one document given its id.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="id">The Id of the document you want to get.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        TDocument GetById<TDocument>(TKey id, string partitionKey = null) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Asynchronously returns one document given an expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        Task<TDocument> GetOneAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Returns one document given an expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        TDocument GetOne<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Returns a collection cursor.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        IFindFluent<TDocument, TDocument> GetCursor<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Asynchronously returns true if any of the document of the collection matches the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        Task<bool> AnyAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Returns true if any of the document of the collection matches the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        bool Any<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Asynchronously returns a list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        Task<List<TDocument>> GetAllAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Returns a list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        List<TDocument> GetAll<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Asynchronously counts how many documents match the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        Task<long> CountAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Counts how many documents match the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        long Count<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>;
+
+        #endregion
+
+        #region Min / Max
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="orderByDescending">A property selector to order by descending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        Task<TDocument> GetByMaxAsync<TDocument>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> orderByDescending, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="orderByDescending">A property selector to order by descending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        /// <returns></returns>
+        TDocument GetByMax<TDocument>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> orderByDescending, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="orderByAscending">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        Task<TDocument> GetByMinAsync<TDocument>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> orderByAscending, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="orderByAscending">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        TDocument GetByMin<TDocument>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> orderByAscending, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Gets the maximum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        Task<TValue> GetMaxValueAsync<TDocument, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> maxValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Gets the maximum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        TValue GetMaxValue<TDocument, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> maxValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Gets the minimum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        Task<TValue> GetMinValueAsync<TDocument, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> minValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Gets the minimum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        TValue GetMinValue<TDocument, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> minValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        #endregion
+
+        #region Maths
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        Task<int> SumByAsync<TDocument>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, int>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        Task<decimal> SumByAsync<TDocument>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, decimal>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        int SumBy<TDocument>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, int>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        decimal SumBy<TDocument>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, decimal>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        #endregion Maths
+
+        #region Project
+
+        /// <summary>
+        /// Asynchronously returns a projected document matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        Task<TProjection> ProjectOneAsync<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TProjection : class;
+
+        /// <summary>
+        /// Returns a projected document matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        TProjection ProjectOne<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TProjection : class;
+
+        /// <summary>
+        /// Asynchronously returns a list of projected documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        Task<List<TProjection>> ProjectManyAsync<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TProjection : class;
+
+        /// <summary>
+        /// Asynchronously returns a list of projected documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        List<TProjection> ProjectMany<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TProjection : class;
+
+        #endregion Project
+
+        #region Group By
+
+        /// <summary>
+        /// Groups a collection of documents given a grouping criteria, 
+        /// and returns a dictionary of listed document groups with keys having the different values of the grouping criteria.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TGroupKey">The type of the grouping criteria.</typeparam>
+        /// <typeparam name="TProjection">The type of the projected group.</typeparam>
+        /// <param name="groupingCriteria">The grouping criteria.</param>
+        /// <param name="groupProjection">The projected group result.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        List<TProjection> GroupBy<TDocument, TGroupKey, TProjection>(
+            Expression<Func<TDocument, TGroupKey>> groupingCriteria,
+            Expression<Func<IGrouping<TGroupKey, TDocument>, TProjection>> groupProjection,
+            string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TProjection : class, new();
+
+        /// <summary>
+        /// Groups filtered a collection of documents given a grouping criteria, 
+        /// and returns a dictionary of listed document groups with keys having the different values of the grouping criteria.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TGroupKey">The type of the grouping criteria.</typeparam>
+        /// <typeparam name="TProjection">The type of the projected group.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="groupingCriteria">The grouping criteria.</param>
+        /// <param name="groupProjection">The projected group result.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        List<TProjection> GroupBy<TDocument, TGroupKey, TProjection>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, TGroupKey>> groupingCriteria,
+            Expression<Func<IGrouping<TGroupKey, TDocument>, TProjection>> groupProjection,
+            string partitionKey = null)
+                where TDocument : IDocument<TKey>
+                where TProjection : class, new();
+
+        #endregion Group By
+
+        #region Pagination
+
+        /// <summary>
+        /// Asynchronously returns a paginated list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="sortSelector">The property selector.</param>
+        /// <param name="ascending">Order of the sorting.</param>
+        /// <param name="skipNumber">The number of documents you want to skip. Default value is 0.</param>
+        /// <param name="takeNumber">The number of documents you want to take. Default value is 50.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        Task<List<TDocument>> GetSortedPaginatedAsync<TDocument>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, object>> sortSelector,
+            bool ascending = true,
+            int skipNumber = 0,
+            int takeNumber = 50,
+            string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Asynchronously returns a paginated list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="sortDefinition">The sort definition.</param>
+        /// <param name="skipNumber">The number of documents you want to skip. Default value is 0.</param>
+        /// <param name="takeNumber">The number of documents you want to take. Default value is 50.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        Task<List<TDocument>> GetSortedPaginatedAsync<TDocument>(
+            Expression<Func<TDocument, bool>> filter,
+            SortDefinition<TDocument> sortDefinition,
+            int skipNumber = 0,
+            int takeNumber = 50,
+            string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        #endregion Pagination
+    }
+}

MongoDbGenericRepository/Abstractions/IReadOnlyMongoRepository.cs

@@ -1,244 +1,12 @@
-using MongoDB.Driver;
-using System;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Linq.Expressions;
-using MongoDbGenericRepository.Models;
+using System;
 
 namespace MongoDbGenericRepository
 {
     /// <summary>
     /// The IReadOnlyMongoRepository exposes the readonly functionality of the BaseMongoRepository.
     /// </summary>
-    public interface IReadOnlyMongoRepository
+    public interface IReadOnlyMongoRepository : IBaseReadOnlyRepository, IReadOnlyMongoRepository<Guid>
     {
-        /// <summary>
-        /// The connection string.
-        /// </summary>
-        string ConnectionString { get; set; }
-        /// <summary>
-        /// The database name.
-        /// </summary>
-        string DatabaseName { get; set; }
-
-        #region Read
-
-        /// <summary>
-        /// Asynchronously returns one document given its id.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="id">The Id of the document you want to get.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        Task<TDocument> GetByIdAsync<TDocument>(Guid id, string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Returns one document given its id.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="id">The Id of the document you want to get.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        TDocument GetById<TDocument>(Guid id, string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Asynchronously returns one document given an expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        Task<TDocument> GetOneAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Returns one document given an expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        TDocument GetOne<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Returns a collection cursor.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        IFindFluent<TDocument, TDocument> GetCursor<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Asynchronously returns true if any of the document of the collection matches the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        Task<bool> AnyAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Returns true if any of the document of the collection matches the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        bool Any<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Asynchronously returns a list of the documents matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        Task<List<TDocument>> GetAllAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Returns a list of the documents matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        List<TDocument> GetAll<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Asynchronously counts how many documents match the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        Task<long> CountAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument;
-
-        /// <summary>
-        /// Counts how many documents match the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        long Count<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument;
-
-        #endregion
-
-        #region Read TKey
-
-        /// <summary>
-        /// Asynchronously returns one document given its id.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="id">The Id of the document you want to get.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        Task<TDocument> GetByIdAsync<TDocument, TKey>(TKey id, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Returns one document given its id.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="id">The Id of the document you want to get.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        TDocument GetById<TDocument, TKey>(TKey id, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Asynchronously returns one document given an expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        Task<TDocument> GetOneAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Returns one document given an expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        TDocument GetOne<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-
-        /// <summary>
-        /// Returns a collection cursor.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        IFindFluent<TDocument, TDocument> GetCursor<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-
-        /// <summary>
-        /// Returns true if any of the document of the collection matches the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        Task<bool> AnyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Returns true if any of the document of the collection matches the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        bool Any<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Asynchronously returns a list of the documents matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        Task<List<TDocument>> GetAllAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Returns a list of the documents matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        List<TDocument> GetAll<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Asynchronously counts how many documents match the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partitionKey</param>
-        Task<long> CountAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        /// <summary>
-        /// Counts how many documents match the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partitionKey</param>
-        long Count<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
-
-        #endregion
-    }
 
     }
+}

MongoDbGenericRepository/Attributes/CollectionNameAttribute.cs

@@ -17,6 +17,10 @@ namespace MongoDbGenericRepository.Attributes
         /// </summary>
 		public string Name { get; set; }
 
+        /// <summary>
+        /// The constructor.
+        /// </summary>
+        /// <param name="name">The name of the collection.</param>
 		public CollectionNameAttribute(string name)
 		{
 			this.Name = name;

MongoDbGenericRepository/BaseMongoRepository.Create.cs

@@ -0,0 +1,187 @@
+using MongoDbGenericRepository.DataAccess.Create;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository
+{
+    public interface IBaseMongoRepository_Create : IBaseMongoRepository_Create<Guid>
+    {
+        /// <summary>
+        /// Asynchronously adds a document to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="document">The document you want to add.</param>
+        Task AddOneAsync<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Adds a document to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="document">The document you want to add.</param>
+        void AddOne<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Asynchronously adds a list of documents to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documents">The documents you want to add.</param>
+        Task AddManyAsync<TDocument, TKey>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Adds a list of documents to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documents">The documents you want to add.</param>
+        void AddMany<TDocument, TKey>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+    }
+
+    /// <summary>
+    /// The base Repository, it is meant to be inherited from by your custom custom MongoRepository implementation.
+    /// Its constructor must be given a connection string and a database name.
+    /// </summary>
+    public abstract partial class BaseMongoRepository : IBaseMongoRepository_Create
+    {
+        private readonly object _initLock = new object();
+        private MongoDbCreator _mongoDbCreator;
+        protected virtual MongoDbCreator MongoDbCreator
+        {
+            get
+            {
+                if (_mongoDbCreator != null) { return _mongoDbCreator; }
+
+                lock (_initLock)
+                {
+                    if (_mongoDbCreator == null)
+                    {
+                        _mongoDbCreator = new MongoDbCreator(MongoDbContext);
+                    }
+                }
+
+                return _mongoDbCreator;
+            }
+            set { _mongoDbCreator = value; }
+        }
+
+        /// <summary>
+        /// Asynchronously adds a document to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="document">The document you want to add.</param>
+        public virtual async Task AddOneAsync<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            await MongoDbCreator.AddOneAsync<TDocument, TKey>(document);
+        }
+
+        /// <summary>
+        /// Asynchronously adds a document to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="document">The document you want to add.</param>
+        public virtual async Task AddOneAsync<TDocument>(TDocument document) 
+            where TDocument : IDocument<Guid>
+        {
+            await MongoDbCreator.AddOneAsync<TDocument, Guid>(document);
+        }
+
+        /// <summary>
+        /// Adds a document to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="document">The document you want to add.</param>
+        public virtual void AddOne<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            MongoDbCreator.AddOne<TDocument, TKey>(document);
+        }
+
+        /// <summary>
+        /// Adds a document to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="document">The document you want to add.</param>
+        public virtual void AddOne<TDocument>(TDocument document) where TDocument : IDocument<Guid>
+        {
+            MongoDbCreator.AddOne<TDocument, Guid>(document);
+        }
+
+        /// <summary>
+        /// Asynchronously adds a list of documents to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documents">The documents you want to add.</param>
+        public virtual async Task AddManyAsync<TDocument, TKey>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            await MongoDbCreator.AddManyAsync<TDocument, TKey>(documents);
+        }
+
+        /// <summary>
+        /// Asynchronously adds a list of documents to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documents">The documents you want to add.</param>
+        public virtual async Task AddManyAsync<TDocument>(IEnumerable<TDocument> documents) 
+            where TDocument : IDocument<Guid>
+        {
+            await MongoDbCreator.AddManyAsync<TDocument, Guid>(documents);
+        }
+
+        /// <summary>
+        /// Adds a list of documents to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documents">The documents you want to add.</param>
+        public virtual void AddMany<TDocument, TKey>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            MongoDbCreator.AddMany<TDocument, TKey>(documents);
+        }
+
+        /// <summary>
+        /// Adds a list of documents to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documents">The documents you want to add.</param>
+        public virtual void AddMany<TDocument>(IEnumerable<TDocument> documents) 
+            where TDocument : IDocument<Guid>
+        {
+            MongoDbCreator.AddMany<TDocument, Guid>(documents);
+        }
+    }
+
+}

MongoDbGenericRepository/BaseMongoRepository.Delete.cs

@@ -0,0 +1,344 @@
+using MongoDbGenericRepository.DataAccess.Delete;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository
+{
+    public interface IBaseMongoRepository_Delete : IBaseMongoRepository_Delete<Guid>
+    {
+        /// <summary>
+        /// Deletes a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="document">The document you want to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        long DeleteOne<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="document">The document you want to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        Task<long> DeleteOneAsync<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        long DeleteOne<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        Task<long> DeleteOneAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Asynchronously deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        Task<long> DeleteManyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Asynchronously deletes a list of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documents">The list of documents to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        Task<long> DeleteManyAsync<TDocument, TKey>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Deletes a list of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documents">The list of documents to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        long DeleteMany<TDocument, TKey>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        long DeleteMany<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+    }
+
+    public abstract partial class BaseMongoRepository : IBaseMongoRepository_Delete
+    {
+        private MongoDbEraser _mongoDbEraser;
+        protected virtual MongoDbEraser MongoDbEraser
+        {
+            get
+            {
+                if (_mongoDbEraser != null) { return _mongoDbEraser; }
+
+                lock (_initLock)
+                {
+                    if (_mongoDbEraser == null)
+                    {
+                        _mongoDbEraser = new MongoDbEraser(MongoDbContext);
+                    }
+                }
+
+                return _mongoDbEraser;
+            }
+            set { _mongoDbEraser = value; }
+        }
+
+        #region Delete
+
+        /// <summary>
+        /// Asynchronously deletes a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="document">The document you want to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteOneAsync<TDocument>(TDocument document) where TDocument : IDocument<Guid>
+        {
+            return await MongoDbEraser.DeleteOneAsync<TDocument, Guid>(document);
+        }
+
+        /// <summary>
+        /// Deletes a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="document">The document you want to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteOne<TDocument>(TDocument document) where TDocument : IDocument<Guid>
+        {
+            return MongoDbEraser.DeleteOne<TDocument, Guid>(document);
+        }
+
+        /// <summary>
+        /// Deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteOne<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<Guid>
+        {
+            return MongoDbEraser.DeleteOne<TDocument, Guid>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteOneAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<Guid>
+        {
+            return await MongoDbEraser.DeleteOneAsync<TDocument, Guid>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteManyAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<Guid>
+        {
+            return await MongoDbEraser.DeleteManyAsync<TDocument, Guid>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously deletes a list of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documents">The list of documents to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteManyAsync<TDocument>(IEnumerable<TDocument> documents) where TDocument : IDocument<Guid>
+        {
+            return await DeleteManyAsync<TDocument, Guid>(documents);
+        }
+
+        /// <summary>
+        /// Deletes a list of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documents">The list of documents to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteMany<TDocument>(IEnumerable<TDocument> documents) where TDocument : IDocument<Guid>
+        {
+            return DeleteMany<TDocument, Guid>(documents);
+        }
+
+        /// <summary>
+        /// Deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteMany<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<Guid>
+        {
+            return MongoDbEraser.DeleteMany<TDocument, Guid>(filter, partitionKey);
+        }
+
+        #endregion Delete
+
+        #region Delete TKey
+
+        /// <summary>
+        /// Deletes a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="document">The document you want to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteOne<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbEraser.DeleteOne<TDocument, TKey>(document);
+        }
+
+        /// <summary>
+        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="document">The document you want to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteOneAsync<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbEraser.DeleteOneAsync<TDocument, TKey>(document);
+        }
+
+        /// <summary>
+        /// Deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteOne<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbEraser.DeleteOne<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteOneAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbEraser.DeleteOneAsync<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteManyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbEraser.DeleteManyAsync<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously deletes a list of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documents">The list of documents to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteManyAsync<TDocument, TKey>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbEraser.DeleteManyAsync<TDocument, TKey>(documents);
+        }
+
+        /// <summary>
+        /// Deletes a list of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documents">The list of documents to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteMany<TDocument, TKey>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbEraser.DeleteMany<TDocument, TKey>(documents);
+        }
+
+        /// <summary>
+        /// Deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteMany<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbEraser.DeleteMany<TDocument, TKey>(filter, partitionKey);
+        }
+
+        #endregion
+
+    }
+}

MongoDbGenericRepository/BaseMongoRepository.Index.cs

@@ -0,0 +1,320 @@
+using MongoDbGenericRepository.DataAccess.Index;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using System.Linq.Expressions;
+using MongoDbGenericRepository.Models;
+
+namespace MongoDbGenericRepository
+{
+    public interface IBaseMongoRepository_Index : IBaseMongoRepository_Index<Guid>
+    {
+        /// <summary>
+        /// Returns the names of the indexes present on a collection.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="partitionKey">An optional partition key</param>
+        /// <returns>A list containing the names of the indexes on on the concerned collection.</returns>
+        Task<List<string>> GetIndexesNamesAsync<TDocument, TKey>(string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Create a text index on the given field.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        Task<string> CreateTextIndexAsync<TDocument, TKey>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Creates an index on the given field in ascending order.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        Task<string> CreateAscendingIndexAsync<TDocument, TKey>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Creates an index on the given field in descending order.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        Task<string> CreateDescendingIndexAsync<TDocument, TKey>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+        where TDocument : IDocument<TKey>
+        where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Creates a hashed index on the given field.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        Task<string> CreateHashedIndexAsync<TDocument, TKey>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Creates a combined text index.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="fields">The fields we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        Task<string> CreateCombinedTextIndexAsync<TDocument, TKey>(IEnumerable<Expression<Func<TDocument, object>>> fields, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+
+        /// <summary>
+        /// Drops the index given a field name
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="indexName">The name of the index</param>
+        /// <param name="partitionKey">An optional partition key</param>
+        Task DropIndexAsync<TDocument, TKey>(string indexName, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>;
+    }
+    /// <summary>
+    /// The base Repository, it is meant to be inherited from by your custom custom MongoRepository implementation.
+    /// Its constructor must be given a connection string and a database name.
+    /// </summary>
+    public abstract partial class BaseMongoRepository : IBaseMongoRepository_Index
+    {
+        private MongoDbIndexHandler _mongoDbIndexHandler;
+        protected virtual MongoDbIndexHandler MongoDbIndexHandler
+        {
+            get
+            {
+                if (_mongoDbIndexHandler != null) { return _mongoDbIndexHandler; }
+
+                lock (_initLock)
+                {
+                    if (_mongoDbIndexHandler == null)
+                    {
+                        _mongoDbIndexHandler = new MongoDbIndexHandler(MongoDbContext);
+                    }
+                }
+                return _mongoDbIndexHandler;
+            }
+            set { _mongoDbIndexHandler = value; }
+        }
+
+        /// <summary>
+        /// Returns the names of the indexes present on a collection.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="partitionKey">An optional partition key</param>
+        /// <returns>A list containing the names of the indexes on on the concerned collection.</returns>
+        public async Task<List<string>> GetIndexesNamesAsync<TDocument>(string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbIndexHandler.GetIndexesNamesAsync<TDocument, Guid>(partitionKey);
+        }
+
+        /// <summary>
+        /// Returns the names of the indexes present on a collection.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="partitionKey">An optional partition key</param>
+        /// <returns>A list containing the names of the indexes on on the concerned collection.</returns>
+        public async virtual Task<List<string>> GetIndexesNamesAsync<TDocument, TKey>(string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbIndexHandler.GetIndexesNamesAsync<TDocument, TKey>(partitionKey);
+        }
+
+        /// <summary>
+        /// Create a text index on the given field.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async Task<string> CreateTextIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbIndexHandler.CreateTextIndexAsync<TDocument, Guid>(field, indexCreationOptions, partitionKey);
+        }
+
+        /// <summary>
+        /// Create a text index on the given field.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async virtual Task<string> CreateTextIndexAsync<TDocument, TKey>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbIndexHandler.CreateTextIndexAsync<TDocument, TKey>(field, indexCreationOptions, partitionKey);
+        }
+
+        /// <summary>
+        /// Creates an index on the given field in ascending order.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async Task<string> CreateAscendingIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null) 
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbIndexHandler.CreateAscendingIndexAsync<TDocument, Guid>(field, indexCreationOptions, partitionKey);
+        }
+
+        /// <summary>
+        /// Creates an index on the given field in ascending order.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async virtual Task<string> CreateAscendingIndexAsync<TDocument, TKey>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbIndexHandler.CreateAscendingIndexAsync<TDocument, TKey>(field, indexCreationOptions, partitionKey);
+        }
+
+        /// <summary>
+        /// Creates an index on the given field in descending order.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async Task<string> CreateDescendingIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbIndexHandler.CreateDescendingIndexAsync<TDocument, Guid>(field, indexCreationOptions, partitionKey);
+        }
+
+        /// <inheritdoc />
+        public async virtual Task<string> CreateDescendingIndexAsync<TDocument, TKey>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbIndexHandler.CreateDescendingIndexAsync<TDocument, TKey>(field, indexCreationOptions, partitionKey);
+        }
+
+        /// <summary>
+        /// Creates a hashed index on the given field.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async Task<string> CreateHashedIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbIndexHandler.CreateHashedIndexAsync<TDocument, Guid>(field, indexCreationOptions, partitionKey);
+        }
+
+        /// <inheritdoc />
+        public async virtual Task<string> CreateHashedIndexAsync<TDocument, TKey>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbIndexHandler.CreateHashedIndexAsync<TDocument, TKey>(field, indexCreationOptions, partitionKey);
+        }
+
+        /// <summary>
+        /// Creates a combined text index.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="fields">The fields we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async Task<string> CreateCombinedTextIndexAsync<TDocument>(IEnumerable<Expression<Func<TDocument, object>>> fields, IndexCreationOptions indexCreationOptions = null, string partitionKey = null) 
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbIndexHandler.CreateCombinedTextIndexAsync<TDocument, Guid>(fields, indexCreationOptions, partitionKey);
+        }
+
+        /// <inheritdoc />
+        public async virtual Task<string> CreateCombinedTextIndexAsync<TDocument, TKey>(IEnumerable<Expression<Func<TDocument, object>>> fields, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbIndexHandler.CreateCombinedTextIndexAsync<TDocument, TKey>(fields, indexCreationOptions, partitionKey);
+        }
+
+        /// <summary>
+        /// Drops the index given a field name
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="indexName">The name of the index</param>
+        /// <param name="partitionKey">An optional partition key</param>
+        public async Task DropIndexAsync<TDocument>(string indexName, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            await MongoDbIndexHandler.DropIndexAsync<TDocument, Guid>(indexName, partitionKey);
+        }
+
+        /// <inheritdoc />
+        public async virtual Task DropIndexAsync<TDocument, TKey>(string indexName, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            await MongoDbIndexHandler.DropIndexAsync<TDocument, TKey>(indexName, partitionKey);
+        }
+    }
+}

MongoDbGenericRepository/BaseMongoRepository.Main.cs

@@ -0,0 +1,177 @@
+using MongoDB.Driver;
+using MongoDbGenericRepository.Models;
+using MongoDbGenericRepository.Utils;
+using System;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository
+{
+    /// <summary>
+    /// The base Repository, it is meant to be inherited from by your custom custom MongoRepository implementation.
+    /// Its constructor must be given a connection string and a database name.
+    /// </summary>
+    public abstract partial class BaseMongoRepository : ReadOnlyMongoRepository, IBaseMongoRepository
+    {
+        /// <summary>
+        /// The constructor taking a connection string and a database name.
+        /// </summary>
+        /// <param name="connectionString">The connection string of the MongoDb server.</param>
+        /// <param name="databaseName">The name of the database against which you want to perform operations.</param>
+        protected BaseMongoRepository(string connectionString, string databaseName = null) : base(connectionString, databaseName)
+        {
+        }
+
+        /// <summary>
+        /// The contructor taking a <see cref="IMongoDbContext"/>.
+        /// </summary>
+        /// <param name="mongoDbContext">A mongodb context implementing <see cref="IMongoDbContext"/></param>
+        protected BaseMongoRepository(IMongoDbContext mongoDbContext) : base(mongoDbContext)
+        {
+        }
+
+        /// <summary>
+        /// The contructor taking a <see cref="IMongoDatabase"/>.
+        /// </summary>
+        /// <param name="mongoDatabase">A mongodb context implementing <see cref="IMongoDatabase"/></param>
+        protected BaseMongoRepository(IMongoDatabase mongoDatabase) : base(mongoDatabase)
+        {
+        }
+
+        /// <summary>
+        /// Asynchronously returns a paginated list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="skipNumber">The number of documents you want to skip. Default value is 0.</param>
+        /// <param name="takeNumber">The number of documents you want to take. Default value is 50.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual async Task<List<TDocument>> GetPaginatedAsync<TDocument>(
+            Expression<Func<TDocument, bool>> filter,
+            int skipNumber = 0,
+            int takeNumber = 50,
+            string partitionKey = null)
+            where TDocument : IDocument
+        {
+            return await HandlePartitioned<TDocument>(partitionKey).Find(filter).Skip(skipNumber).Limit(takeNumber).ToListAsync();
+        }
+
+        /// <summary>
+        /// Asynchronously returns a paginated list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="skipNumber">The number of documents you want to skip. Default value is 0.</param>
+        /// <param name="takeNumber">The number of documents you want to take. Default value is 50.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual async Task<List<TDocument>> GetPaginatedAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, int skipNumber = 0, int takeNumber = 50, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).Skip(skipNumber).Limit(takeNumber).ToListAsync();
+        }
+
+        #region Find And Update
+
+        /// <summary>
+        /// GetAndUpdateOne with filter
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="update"></param>
+        /// <param name="options"></param>
+        /// <returns></returns>
+        public virtual async Task<TDocument> GetAndUpdateOne<TDocument>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> update, FindOneAndUpdateOptions<TDocument, TDocument> options) where TDocument : IDocument
+        {
+            return await GetCollection<TDocument>().FindOneAndUpdateAsync(filter, update, options);
+        }
+
+        /// <summary>
+        /// GetAndUpdateOne with filter
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="update"></param>
+        /// <param name="options"></param>
+        /// <returns></returns>
+        public virtual async Task<TDocument> GetAndUpdateOne<TDocument, TKey>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> update, FindOneAndUpdateOptions<TDocument, TDocument> options)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await GetCollection<TDocument, TKey>().FindOneAndUpdateAsync(filter, update, options);
+        }
+
+        #endregion Find And Update
+
+        /// <summary>
+        /// Sets the value of the document Id if it is not set already.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="document">The document.</param>
+        protected void FormatDocument<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            if (document == null)
+            {
+                throw new ArgumentNullException(nameof(document));
+            }
+            var defaultTKey = default(TKey);
+            if (document.Id == null
+                || (defaultTKey != null
+                    && defaultTKey.Equals(document.Id)))
+            {
+                document.Id = IdGenerator.GetId<TKey>();
+            }
+        }
+
+        /// <summary>
+        /// Sets the value of the document Id if it is not set already.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="document">The document.</param>
+        protected void FormatDocument<TDocument>(TDocument document) where TDocument : IDocument
+        {
+            if (document == null)
+            {
+                throw new ArgumentNullException(nameof(document));
+            }
+            if (document.Id == default(Guid))
+            {
+                document.Id = Guid.NewGuid();
+            }
+        }
+
+        /// <summary>
+        /// Gets a collections for a potentially partitioned document type.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="partitionKey">The collection partition key.</param>
+        /// <returns></returns>
+        protected virtual IMongoCollection<TDocument> HandlePartitioned<TDocument>(string partitionKey)
+            where TDocument : IDocument<Guid>
+        {
+            if (!string.IsNullOrEmpty(partitionKey))
+            {
+                return GetCollection<TDocument>(partitionKey);
+            }
+            return GetCollection<TDocument>();
+        }
+
+        /// <summary>
+        /// Gets a collections for the type TDocument with a partition key.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="partitionKey">The collection partition key.</param>
+        /// <returns></returns>
+        protected virtual IMongoCollection<TDocument> GetCollection<TDocument>(string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return MongoDbContext.GetCollection<TDocument>(partitionKey);
+        }
+    }
+}

MongoDbGenericRepository/BaseMongoRepository.Update.ClientSession.cs

@@ -0,0 +1,197 @@
+using MongoDB.Driver;
+using MongoDbGenericRepository.DataAccess.Update;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Linq.Expressions;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository
+{
+    public abstract partial class BaseMongoRepository : IBaseMongoRepository_Update_ClientSession
+    {
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey>(IClientSessionHandle session, TDocument modifiedDocument, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey>(session, modifiedDocument, cancellationToken);
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        public virtual bool UpdateOne<TDocument, TKey>(IClientSessionHandle session, TDocument modifiedDocument, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey>(session, modifiedDocument, cancellationToken);
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="documentToModify">The document to modify.</param>
+        /// <param name="update">The update definition.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey>(IClientSessionHandle session, TDocument documentToModify, UpdateDefinition<TDocument> update, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey>(session, documentToModify, update, cancellationToken);
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="documentToModify">The document to modify.</param>
+        /// <param name="update">The update definition.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        public virtual bool UpdateOne<TDocument, TKey>(IClientSessionHandle session, TDocument documentToModify, UpdateDefinition<TDocument> update, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey>(session, documentToModify, update, cancellationToken);
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param> 
+        /// <param name="documentToModify">The document to modify.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey, TField>(IClientSessionHandle session, TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey, TField>(session, documentToModify, field, value, cancellationToken);
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="documentToModify">The document to modify.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        public virtual bool UpdateOne<TDocument, TKey, TField>(IClientSessionHandle session, TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey, TField>(session, documentToModify, field, value, cancellationToken);
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="filter">The filter for the update.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="partitionKey">The optional partition key.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey, TField>(IClientSessionHandle session, FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey, TField>(session, filter, field, value, partitionKey, cancellationToken);
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="filter">The filter for the update.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="partitionKey">The optional partition key.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey, TField>(IClientSessionHandle session, Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey, TField>(session, filter, field, value, partitionKey, cancellationToken);
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="filter">The filter for the update.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="partitionKey">The optional partition key.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        public virtual bool UpdateOne<TDocument, TKey, TField>(IClientSessionHandle session, FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey, TField>(session, filter, field, value, partitionKey, cancellationToken);
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="filter">The filter for the update.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="partitionKey">The optional partition key.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns>A boolean value indicating success.</returns>
+        public virtual bool UpdateOne<TDocument, TKey, TField>(IClientSessionHandle session, Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return UpdateOne<TDocument, TKey, TField>(session, Builders<TDocument>.Filter.Where(filter), field, value, partitionKey, cancellationToken);
+        }
+    }
+}

MongoDbGenericRepository/BaseMongoRepository.Update.cs

@@ -0,0 +1,573 @@
+using MongoDB.Driver;
+using MongoDbGenericRepository.DataAccess.Update;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository
+{
+    /// <summary>
+    /// The base Repository, it is meant to be inherited from by your custom custom MongoRepository implementation.
+    /// Its constructor must be given a connection string and a database name.
+    /// </summary>
+    public abstract partial class BaseMongoRepository : IBaseMongoRepository_Update
+    {
+        private MongoDbUpdater _mongoDbUpdater;
+        protected virtual MongoDbUpdater MongoDbUpdater
+        {
+            get
+            {
+                if (_mongoDbUpdater != null) { return _mongoDbUpdater; }
+
+                lock (_initLock)
+                {
+                    if (_mongoDbUpdater == null)
+                    {
+                        _mongoDbUpdater = new MongoDbUpdater(MongoDbContext);
+                    }
+                }
+
+                return _mongoDbUpdater;
+            }
+            set { _mongoDbUpdater = value; }
+        }
+
+        #region Update
+
+        /// <summary>
+        /// Asynchronously Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument>(TDocument modifiedDocument) where TDocument : IDocument<Guid>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, Guid>(modifiedDocument);
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        public virtual bool UpdateOne<TDocument>(TDocument modifiedDocument) where TDocument : IDocument<Guid>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, Guid>(modifiedDocument);
+        }
+
+        /// <summary>
+        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, Guid>(documentToModify, update);
+
+        }
+
+        /// <summary>
+        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        public virtual bool UpdateOne<TDocument>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument<Guid>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, Guid>(documentToModify, update);
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        public virtual bool UpdateOne<TDocument, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument<Guid>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, Guid, TField>(documentToModify, field, value);
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, Guid, TField>(documentToModify, field, value);
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual bool UpdateOne<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, Guid, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entity selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual bool UpdateOne<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, Guid, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, Guid, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entity selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, Guid, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbUpdater.UpdateManyAsync<TDocument, Guid, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbUpdater.UpdateManyAsync<TDocument, Guid, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbUpdater.UpdateManyAsync<TDocument, Guid>(filter, updateDefinition, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public async Task<long> UpdateManyAsync<TDocument>(Expression<Func<TDocument, bool>> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return await MongoDbUpdater.UpdateManyAsync<TDocument, Guid>(filter, updateDefinition, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual long UpdateMany<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return MongoDbUpdater.UpdateMany<TDocument, Guid, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual long UpdateMany<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return MongoDbUpdater.UpdateMany<TDocument, Guid, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual long UpdateMany<TDocument>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<Guid>
+        {
+            return MongoDbUpdater.UpdateMany<TDocument, Guid>(filter, updateDefinition, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public long UpdateMany<TDocument>(Expression<Func<TDocument, bool>> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null) 
+            where TDocument : IDocument<Guid>
+        {
+            return MongoDbUpdater.UpdateMany<TDocument, Guid>(filter, updateDefinition, partitionKey);
+        }
+
+        #endregion Update
+
+        #region Update TKey
+
+        /// <summary>
+        /// Asynchronously Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey>(TDocument modifiedDocument)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey>(modifiedDocument);
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        public virtual bool UpdateOne<TDocument, TKey>(TDocument modifiedDocument)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey>(modifiedDocument);
+        }
+
+        /// <summary>
+        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey>(documentToModify, update);
+        }
+
+        /// <summary>
+        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        public virtual bool UpdateOne<TDocument, TKey>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey>(documentToModify, update);
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        public virtual bool UpdateOne<TDocument, TKey, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey, TField>(documentToModify, field, value);
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey, TField>(documentToModify, field, value);
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual bool UpdateOne<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entity selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual bool UpdateOne<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entity selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey, TField>(Builders<TDocument>.Filter.Where(filter), field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateManyAsync<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateManyAsync<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument, TKey>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateManyAsync<TDocument, TKey>(filter, updateDefinition, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbUpdater.UpdateManyAsync<TDocument, TKey>(filter, updateDefinition, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual long UpdateMany<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbUpdater.UpdateMany<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual long UpdateMany<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbUpdater.UpdateMany<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual long UpdateMany<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbUpdater.UpdateMany<TDocument, TKey>(filter, updateDefinition, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual long UpdateMany<TDocument, TKey>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbUpdater.UpdateMany<TDocument, TKey>(filter, updateDefinition, partitionKey);
+        }
+
+        #endregion Update
+    }
+
+}

MongoDbGenericRepository/DataAccess/Base/DataAccessBase.cs

@@ -0,0 +1,167 @@
+using MongoDB.Driver;
+using MongoDB.Driver.Linq;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Linq;
+using System.Linq.Expressions;
+
+namespace MongoDbGenericRepository.DataAccess.Base
+{
+    /// <summary>
+    /// A base class for accessing the Database and its Collections.
+    /// </summary>
+    public class DataAccessBase
+    {
+        /// <summary>
+        /// The MongoDbContext
+        /// </summary>
+        protected IMongoDbContext MongoDbContext;
+
+        /// <summary>
+        /// The constructor of the DataAccessBase class
+        /// </summary>
+        /// <param name="mongoDbContext"></param>
+        public DataAccessBase(IMongoDbContext mongoDbContext)
+        {
+            MongoDbContext = mongoDbContext;
+        }
+
+        #region Utility Methods
+
+        public virtual IMongoQueryable<TDocument> GetQuery<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return GetCollection<TDocument, TKey>(partitionKey).AsQueryable().Where(filter);
+        }
+
+        /// <summary>
+        /// Gets a collections for a potentially partitioned document type.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="document">The document.</param>
+        /// <returns></returns>
+        public virtual IMongoCollection<TDocument> HandlePartitioned<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            if (document is IPartitionedDocument)
+            {
+                return GetCollection<TDocument, TKey>(((IPartitionedDocument)document).PartitionKey);
+            }
+            return GetCollection<TDocument, TKey>();
+        }
+
+        /// <summary>
+        /// Gets a collections for the type TDocument with a partition key.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="partitionKey">The collection partition key.</param>
+        /// <returns></returns>
+        public virtual IMongoCollection<TDocument> GetCollection<TDocument, TKey>(string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbContext.GetCollection<TDocument>(partitionKey);
+        }
+
+        /// <summary>
+        /// Gets a collections for a potentially partitioned document type.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="partitionKey">The collection partition key.</param>
+        /// <returns></returns>
+        public virtual IMongoCollection<TDocument> HandlePartitioned<TDocument, TKey>(string partitionKey)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            if (!string.IsNullOrEmpty(partitionKey))
+            {
+                return GetCollection<TDocument, TKey>(partitionKey);
+            }
+            return GetCollection<TDocument, TKey>();
+        }
+
+        /// <summary>
+        /// Converts a LINQ expression of TDocument, TValue to a LINQ expression of TDocument, object
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TValue">The type of the value.</typeparam>
+        /// <param name="expression">The expression to convert</param>
+        protected virtual Expression<Func<TDocument, object>> ConvertExpression<TDocument, TValue>(Expression<Func<TDocument, TValue>> expression)
+        {
+            var param = expression.Parameters[0];
+            Expression body = expression.Body;
+            var convert = Expression.Convert(body, typeof(object));
+            return Expression.Lambda<Func<TDocument, object>>(convert, param);
+        }
+
+        /// <summary>
+        /// Maps a IndexCreationOptions object to a MongoDB.Driver.CreateIndexOptions object
+        /// </summary>
+        /// <param name="indexCreationOptions">The options for creating an index.</param>
+        /// <returns></returns>
+        protected virtual CreateIndexOptions MapIndexOptions(IndexCreationOptions indexCreationOptions)
+        {
+            return new CreateIndexOptions
+            {
+                Unique = indexCreationOptions.Unique,
+                TextIndexVersion = indexCreationOptions.TextIndexVersion,
+                SphereIndexVersion = indexCreationOptions.SphereIndexVersion,
+                Sparse = indexCreationOptions.Sparse,
+                Name = indexCreationOptions.Name,
+                Min = indexCreationOptions.Min,
+                Max = indexCreationOptions.Max,
+                LanguageOverride = indexCreationOptions.LanguageOverride,
+                ExpireAfter = indexCreationOptions.ExpireAfter,
+                DefaultLanguage = indexCreationOptions.DefaultLanguage,
+                Bits = indexCreationOptions.Bits,
+                Background = indexCreationOptions.Background,
+                Version = indexCreationOptions.Version
+            };
+        }
+
+
+        /// <summary>
+        /// Gets the minimum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        protected virtual IFindFluent<TDocument, TDocument> GetMinMongoQuery<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> minValueSelector, string partitionKey = null)
+                    where TDocument : IDocument<TKey>
+                    where TKey : IEquatable<TKey>
+        {
+            return GetCollection<TDocument, TKey>(partitionKey).Find(Builders<TDocument>.Filter.Where(filter))
+                                                               .SortBy(ConvertExpression(minValueSelector))
+                                                               .Limit(1);
+        }
+
+        /// <summary>
+        /// Gets the minimum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by descending.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        protected virtual IFindFluent<TDocument, TDocument> GetMaxMongoQuery<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> maxValueSelector, string partitionKey = null)
+                    where TDocument : IDocument<TKey>
+                    where TKey : IEquatable<TKey>
+        {
+            return GetCollection<TDocument, TKey>(partitionKey).Find(Builders<TDocument>.Filter.Where(filter))
+                                                               .SortByDescending(ConvertExpression(maxValueSelector))
+                                                               .Limit(1);
+        }
+
+
+        #endregion
+    }
+}

MongoDbGenericRepository/DataAccess/Create/MongoDbCreator.cs

@@ -0,0 +1,142 @@
+using MongoDB.Driver;
+using MongoDB.Driver.Linq;
+using MongoDbGenericRepository.DataAccess.Base;
+using MongoDbGenericRepository.Models;
+using MongoDbGenericRepository.Utils;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository.DataAccess.Create
+{
+    public class MongoDbCreator : DataAccessBase
+    {
+        public MongoDbCreator(IMongoDbContext mongoDbContext) : base(mongoDbContext)
+        {
+        }
+
+        #region Create TKey
+
+        /// <summary>
+        /// Asynchronously adds a document to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="document">The document you want to add.</param>
+        public virtual async Task AddOneAsync<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            FormatDocument<TDocument, TKey>(document);
+            await HandlePartitioned<TDocument, TKey>(document).InsertOneAsync(document);
+        }
+
+        /// <summary>
+        /// Adds a document to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="document">The document you want to add.</param>
+        public virtual void AddOne<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            FormatDocument<TDocument, TKey>(document);
+            HandlePartitioned<TDocument, TKey>(document).InsertOne(document);
+        }
+
+        /// <summary>
+        /// Asynchronously adds a list of documents to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documents">The documents you want to add.</param>
+        public virtual async Task AddManyAsync<TDocument, TKey>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            if (!documents.Any())
+            {
+                return;
+            }
+            foreach (var document in documents)
+            {
+                FormatDocument<TDocument, TKey>(document);
+            }
+            // cannot use typeof(IPartitionedDocument).IsAssignableFrom(typeof(TDocument)), not available in netstandard 1.5
+            if (documents.Any(e => e is IPartitionedDocument))
+            {
+                foreach (var group in documents.GroupBy(e => ((IPartitionedDocument)e).PartitionKey))
+                {
+                    await HandlePartitioned<TDocument, TKey>(group.FirstOrDefault()).InsertManyAsync(group.ToList());
+                }
+            }
+            else
+            {
+                await GetCollection<TDocument, TKey>().InsertManyAsync(documents.ToList());
+            }
+        }
+
+        /// <summary>
+        /// Adds a list of documents to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documents">The documents you want to add.</param>
+        public virtual void AddMany<TDocument, TKey>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            if (!documents.Any())
+            {
+                return;
+            }
+            foreach (var document in documents)
+            {
+                FormatDocument<TDocument, TKey>(document);
+            }
+            // cannot use typeof(IPartitionedDocument).IsAssignableFrom(typeof(TDocument)), not available in netstandard 1.5
+            if (documents.Any(e => e is IPartitionedDocument))
+            {
+                foreach (var group in documents.GroupBy(e => ((IPartitionedDocument)e).PartitionKey))
+                {
+                    HandlePartitioned<TDocument, TKey>(group.FirstOrDefault()).InsertMany(group.ToList());
+                }
+            }
+            else
+            {
+                GetCollection<TDocument, TKey>().InsertMany(documents.ToList());
+            }
+        }
+
+        #endregion
+
+        /// <summary>
+        /// Sets the value of the document Id if it is not set already.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="document">The document.</param>
+        protected void FormatDocument<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            if (document == null)
+            {
+                throw new ArgumentNullException(nameof(document));
+            }
+            var defaultTKey = default(TKey);
+            if (document.Id == null
+                || (defaultTKey != null
+                    && defaultTKey.Equals(document.Id)))
+            {
+                document.Id = IdGenerator.GetId<TKey>();
+            }
+        }
+    }
+}

MongoDbGenericRepository/DataAccess/Delete/MongoDbEraser.cs

@@ -0,0 +1,180 @@
+using MongoDB.Driver;
+using MongoDB.Driver.Linq;
+using MongoDbGenericRepository.DataAccess.Base;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository.DataAccess.Delete
+{
+    public class MongoDbEraser : DataAccessBase
+    {
+        public MongoDbEraser(IMongoDbContext mongoDbContext) : base(mongoDbContext)
+        {
+        }
+
+        #region Delete TKey
+
+        /// <summary>
+        /// Deletes a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="document">The document you want to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteOne<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", document.Id);
+            return HandlePartitioned<TDocument, TKey>(document).DeleteOne(filter).DeletedCount;
+        }
+
+        /// <summary>
+        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="document">The document you want to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteOneAsync<TDocument, TKey>(TDocument document)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", document.Id);
+            return (await HandlePartitioned<TDocument, TKey>(document).DeleteOneAsync(filter)).DeletedCount;
+        }
+
+        /// <summary>
+        /// Deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteOne<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return HandlePartitioned<TDocument, TKey>(partitionKey).DeleteOne(filter).DeletedCount;
+        }
+
+        /// <summary>
+        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteOneAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return (await HandlePartitioned<TDocument, TKey>(partitionKey).DeleteOneAsync(filter)).DeletedCount;
+        }
+
+        /// <summary>
+        /// Asynchronously deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteManyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return (await HandlePartitioned<TDocument, TKey>(partitionKey).DeleteManyAsync(filter)).DeletedCount;
+        }
+
+        /// <summary>
+        /// Asynchronously deletes a list of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documents">The list of documents to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteManyAsync<TDocument, TKey>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            if (!documents.Any())
+            {
+                return 0;
+            }
+            // cannot use typeof(IPartitionedDocument).IsAssignableFrom(typeof(TDocument)), not available in netstandard 1.5
+            if (documents.Any(e => e is IPartitionedDocument))
+            {
+                long deleteCount = 0;
+                foreach (var group in documents.GroupBy(e => ((IPartitionedDocument)e).PartitionKey))
+                {
+                    var groupIdsTodelete = group.Select(e => e.Id).ToArray();
+                    deleteCount += (await HandlePartitioned<TDocument, TKey>(group.FirstOrDefault()).DeleteManyAsync(x => groupIdsTodelete.Contains(x.Id))).DeletedCount;
+                }
+                return deleteCount;
+            }
+            else
+            {
+                var idsTodelete = documents.Select(e => e.Id).ToArray();
+                return (await HandlePartitioned<TDocument, TKey>(documents.FirstOrDefault()).DeleteManyAsync(x => idsTodelete.Contains(x.Id))).DeletedCount;
+            }
+        }
+
+        /// <summary>
+        /// Deletes a list of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documents">The list of documents to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteMany<TDocument, TKey>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            if (!documents.Any())
+            {
+                return 0;
+            }
+            // cannot use typeof(IPartitionedDocument).IsAssignableFrom(typeof(TDocument)), not available in netstandard 1.5
+            if (documents.Any(e => e is IPartitionedDocument))
+            {
+                long deleteCount = 0;
+                foreach (var group in documents.GroupBy(e => ((IPartitionedDocument)e).PartitionKey))
+                {
+                    var groupIdsTodelete = group.Select(e => e.Id).ToArray();
+                    deleteCount += (HandlePartitioned<TDocument, TKey>(group.FirstOrDefault()).DeleteMany(x => groupIdsTodelete.Contains(x.Id))).DeletedCount;
+                }
+                return deleteCount;
+            }
+            else
+            {
+                var idsTodelete = documents.Select(e => e.Id).ToArray();
+                return (HandlePartitioned<TDocument, TKey>(documents.FirstOrDefault()).DeleteMany(x => idsTodelete.Contains(x.Id))).DeletedCount;
+            }
+        }
+
+        /// <summary>
+        /// Deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteMany<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return HandlePartitioned<TDocument, TKey>(partitionKey).DeleteMany(filter).DeletedCount;
+        }
+
+        #endregion
+
+    }
+}

MongoDbGenericRepository/DataAccess/Index/MongoDbIndexHandler.cs

@@ -0,0 +1,167 @@
+using MongoDB.Driver;
+using MongoDB.Driver.Linq;
+using MongoDbGenericRepository.DataAccess.Base;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository.DataAccess.Index
+{
+    public class MongoDbIndexHandler : DataAccessBase
+    {
+        public MongoDbIndexHandler(IMongoDbContext mongoDbContext) : base(mongoDbContext)
+        {
+        }
+
+        /// <summary>
+        /// Returns the names of the indexes present on a collection.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="partitionKey">An optional partition key</param>
+        /// <returns>A list containing the names of the indexes on on the concerned collection.</returns>
+        public async virtual Task<List<string>> GetIndexesNamesAsync<TDocument, TKey>(string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var indexCursor = await HandlePartitioned<TDocument, TKey>(partitionKey).Indexes.ListAsync();
+            var indexes = await indexCursor.ToListAsync();
+            return indexes.Select(e => e["name"].ToString()).ToList();
+        }
+
+        /// <summary>
+        /// Create a text index on the given field.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async virtual Task<string> CreateTextIndexAsync<TDocument, TKey>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await HandlePartitioned<TDocument, TKey>(partitionKey).Indexes
+                                                                   .CreateOneAsync(
+                                                                     new CreateIndexModel<TDocument>(
+                                                                     Builders<TDocument>.IndexKeys.Text(field),
+                                                                     indexCreationOptions == null ? null : MapIndexOptions(indexCreationOptions)
+                                                                   ));
+        }
+
+        /// <summary>
+        /// Creates an index on the given field in ascending order.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async virtual Task<string> CreateAscendingIndexAsync<TDocument, TKey>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var collection = HandlePartitioned<TDocument, TKey>(partitionKey);
+            var createOptions = indexCreationOptions == null ? null : MapIndexOptions(indexCreationOptions);
+            var indexKey = Builders<TDocument>.IndexKeys;
+            return await collection.Indexes
+                                   .CreateOneAsync(
+                new CreateIndexModel<TDocument>(indexKey.Ascending(field), createOptions));
+        }
+
+        /// <summary>
+        /// Creates an index on the given field in descending order.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async virtual Task<string> CreateDescendingIndexAsync<TDocument, TKey>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var collection = HandlePartitioned<TDocument, TKey>(partitionKey);
+            var createOptions = indexCreationOptions == null ? null : MapIndexOptions(indexCreationOptions);
+            var indexKey = Builders<TDocument>.IndexKeys;
+            return await collection.Indexes
+                                   .CreateOneAsync(
+                new CreateIndexModel<TDocument>(indexKey.Descending(field), createOptions));
+        }
+
+        /// <summary>
+        /// Creates a hashed index on the given field.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async virtual Task<string> CreateHashedIndexAsync<TDocument, TKey>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var collection = HandlePartitioned<TDocument, TKey>(partitionKey);
+            var createOptions = indexCreationOptions == null ? null : MapIndexOptions(indexCreationOptions);
+            var indexKey = Builders<TDocument>.IndexKeys;
+            return await collection.Indexes
+                                   .CreateOneAsync(
+                new CreateIndexModel<TDocument>(indexKey.Hashed(field), createOptions));
+        }
+
+        /// <summary>
+        /// Creates a combined text index.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="fields">The fields we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async virtual Task<string> CreateCombinedTextIndexAsync<TDocument, TKey>(IEnumerable<Expression<Func<TDocument, object>>> fields, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var collection = HandlePartitioned<TDocument, TKey>(partitionKey);
+            var createOptions = indexCreationOptions == null ? null : MapIndexOptions(indexCreationOptions);
+            var listOfDefs = new List<IndexKeysDefinition<TDocument>>();
+            foreach (var field in fields)
+            {
+                listOfDefs.Add(Builders<TDocument>.IndexKeys.Text(field));
+            }
+            return await collection.Indexes
+                                   .CreateOneAsync(new CreateIndexModel<TDocument>(Builders<TDocument>.IndexKeys.Combine(listOfDefs), createOptions));
+        }
+
+        /// <summary>
+        /// Drops the index given a field name
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="indexName">The name of the index</param>
+        /// <param name="partitionKey">An optional partition key</param>
+        public async virtual Task DropIndexAsync<TDocument, TKey>(string indexName, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            await HandlePartitioned<TDocument, TKey>(partitionKey).Indexes.DropOneAsync(indexName);
+        }
+    }
+}

MongoDbGenericRepository/DataAccess/Read/MongoDbReader.Main.cs

@@ -0,0 +1,562 @@
+using MongoDB.Driver;
+using MongoDB.Driver.Linq;
+using MongoDbGenericRepository.DataAccess.Base;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository.DataAccess.Read
+{
+    public partial class MongoDbReader : DataAccessBase
+    {
+        public MongoDbReader(IMongoDbContext mongoDbContext) : base(mongoDbContext)
+        {
+        }
+
+        #region Read TKey
+
+        /// <summary>
+        /// Asynchronously returns one document given its id.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="id">The Id of the document you want to get.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<TDocument> GetByIdAsync<TDocument, TKey>(TKey id, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", id);
+            return await HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).FirstOrDefaultAsync(cancellationToken);
+        }
+
+        /// <summary>
+        /// Returns one document given its id.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="id">The Id of the document you want to get.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual TDocument GetById<TDocument, TKey>(TKey id, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", id);
+            return HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).FirstOrDefault();
+        }
+
+        /// <summary>
+        /// Asynchronously returns one document given an expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<TDocument> GetOneAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).FirstOrDefaultAsync(cancellationToken);
+        }
+
+        /// <summary>
+        /// Returns one document given an expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual TDocument GetOne<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).FirstOrDefault();
+        }
+
+        /// <summary>
+        /// Returns a collection cursor.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual IFindFluent<TDocument, TDocument> GetCursor<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter);
+        }
+
+        /// <summary>
+        /// Returns true if any of the document of the collection matches the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<bool> AnyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var count = await HandlePartitioned<TDocument, TKey>(partitionKey).CountDocumentsAsync(filter, cancellationToken: cancellationToken);
+            return (count > 0);
+        }
+
+        /// <summary>
+        /// Returns true if any of the document of the collection matches the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual bool Any<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var count = HandlePartitioned<TDocument, TKey>(partitionKey).CountDocuments(filter);
+            return (count > 0);
+        }
+
+        /// <summary>
+        /// Asynchronously returns a list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<List<TDocument>> GetAllAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).ToListAsync(cancellationToken);
+        }
+
+        /// <summary>
+        /// Returns a list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual List<TDocument> GetAll<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).ToList();
+        }
+
+        /// <summary>
+        /// Asynchronously counts how many documents match the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partitionKey</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<long> CountAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await HandlePartitioned<TDocument, TKey>(partitionKey).CountDocumentsAsync(filter, cancellationToken: cancellationToken);
+        }
+
+        /// <summary>
+        /// Counts how many documents match the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partitionKey</param>
+        public virtual long Count<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).CountDocuments();
+        }
+
+        #endregion
+
+        #region Min / Max
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by descending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<TDocument> GetByMaxAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> maxValueSelector, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await GetCollection<TDocument, TKey>(partitionKey).Find(Builders<TDocument>.Filter.Where(filter))
+                                                                     .SortByDescending(maxValueSelector)
+                                                                     .Limit(1)
+                                                                     .FirstOrDefaultAsync(cancellationToken);
+        }
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by descending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        public virtual TDocument GetByMax<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> maxValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return GetCollection<TDocument, TKey>(partitionKey).Find(Builders<TDocument>.Filter.Where(filter))
+                                                               .SortByDescending(maxValueSelector)
+                                                               .Limit(1)
+                                                               .FirstOrDefault();
+        }
+
+        /// <summary>
+        /// Gets the document with the minimum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<TDocument> GetByMinAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> minValueSelector, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await GetCollection<TDocument, TKey>(partitionKey).Find(Builders<TDocument>.Filter.Where(filter))
+                                                                     .SortBy(minValueSelector)
+                                                                     .Limit(1)
+                                                                     .FirstOrDefaultAsync(cancellationToken);
+        }
+
+        /// <summary>
+        /// Gets the document with the minimum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        public virtual TDocument GetByMin<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> minValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return GetCollection<TDocument, TKey>(partitionKey).Find(Builders<TDocument>.Filter.Where(filter))
+                                                               .SortBy(minValueSelector)
+                                                               .Limit(1)
+                                                               .FirstOrDefault();
+        }
+
+        /// <summary>
+        /// Gets the maximum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the field for which you want the maximum value.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<TValue> GetMaxValueAsync<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> maxValueSelector, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await GetMaxMongoQuery<TDocument, TKey, TValue>(filter, maxValueSelector, partitionKey)
+                                .Project(maxValueSelector)
+                                .FirstOrDefaultAsync(cancellationToken);
+        }
+
+        /// <summary>
+        /// Gets the maximum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        public virtual TValue GetMaxValue<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> maxValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return GetMaxMongoQuery<TDocument, TKey, TValue>(filter, maxValueSelector, partitionKey)
+                      .Project(maxValueSelector)
+                      .FirstOrDefault();
+        }
+
+        /// <summary>
+        /// Gets the minimum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public virtual async Task<TValue> GetMinValueAsync<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> minValueSelector, string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await GetMinMongoQuery<TDocument, TKey, TValue>(filter, minValueSelector, partitionKey).Project(minValueSelector).FirstOrDefaultAsync(cancellationToken);
+        }
+
+        /// <summary>
+        /// Gets the minimum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual TValue GetMinValue<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> minValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return GetMinMongoQuery<TDocument, TKey, TValue>(filter, minValueSelector, partitionKey).Project(minValueSelector).FirstOrDefault();
+        }
+
+
+        #endregion Min / Max
+
+        #region Sum TKey
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public virtual async Task<int> SumByAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, int>> selector,
+                                                       string partitionKey = null,
+                                                       CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await GetQuery<TDocument, TKey>(filter, partitionKey).SumAsync(selector, cancellationToken);
+        }
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual int SumBy<TDocument, TKey>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, int>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return GetQuery<TDocument, TKey>(filter, partitionKey).Sum(selector);
+        }
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public virtual async Task<decimal> SumByAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, decimal>> selector,
+                                                       string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await GetQuery<TDocument, TKey>(filter, partitionKey).SumAsync(selector, cancellationToken);
+        }
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual decimal SumBy<TDocument, TKey>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, decimal>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return GetQuery<TDocument, TKey>(filter, partitionKey).Sum(selector);
+        }
+
+        #endregion Sum TKey
+    }
+
+    public partial class MongoDbReader
+    {
+        /// <summary>
+        /// Groups a collection of documents given a grouping criteria, 
+        /// and returns a dictionary of listed document groups with keys having the different values of the grouping criteria.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TGroupKey">The type of the grouping criteria.</typeparam>
+        /// <typeparam name="TProjection">The type of the projected group.</typeparam>
+        /// <param name="groupingCriteria">The grouping criteria.</param>
+        /// <param name="groupProjection">The projected group result.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual List<TProjection> GroupBy<TDocument, TGroupKey, TProjection, TKey>(
+            Expression<Func<TDocument, TGroupKey>> groupingCriteria,
+            Expression<Func<IGrouping<TGroupKey, TDocument>, TProjection>> groupProjection,
+            string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class, new()
+        {
+            return HandlePartitioned<TDocument, TKey>(partitionKey)
+                             .Aggregate()
+                             .Group(groupingCriteria, groupProjection)
+                             .ToList();
+
+        }
+
+        /// <summary>
+        /// Groups filtered a collection of documents given a grouping criteria, 
+        /// and returns a dictionary of listed document groups with keys having the different values of the grouping criteria.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TGroupKey">The type of the grouping criteria.</typeparam>
+        /// <typeparam name="TProjection">The type of the projected group.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The grouping criteria.</param>
+        /// <param name="projection">The projected group result.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual List<TProjection> GroupBy<TDocument, TGroupKey, TProjection, TKey>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, TGroupKey>> selector,
+            Expression<Func<IGrouping<TGroupKey, TDocument>, TProjection>> projection,
+            string partitionKey = null)
+                where TDocument : IDocument<TKey>
+                where TKey : IEquatable<TKey>
+                where TProjection : class, new()
+        {
+            var collection = HandlePartitioned<TDocument, TKey>(partitionKey);
+            return collection.Aggregate()
+                             .Match(Builders<TDocument>.Filter.Where(filter))
+                             .Group(selector, projection)
+                             .ToList();
+        }
+
+        /// <summary>
+        /// Groups filtered a collection of documents given a grouping criteria, 
+        /// and returns a dictionary of listed document groups with keys having the different values of the grouping criteria.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TGroupKey">The type of the grouping criteria.</typeparam>
+        /// <typeparam name="TProjection">The type of the projected group.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The grouping criteria.</param>
+        /// <param name="projection">The projected group result.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public virtual async Task<List<TProjection>> GroupByAsync<TDocument, TGroupKey, TProjection, TKey>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, TGroupKey>> selector,
+            Expression<Func<IGrouping<TGroupKey, TDocument>, TProjection>> projection,
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+                where TDocument : IDocument<TKey>
+                where TKey : IEquatable<TKey>
+                where TProjection : class, new()
+        {
+            var collection = HandlePartitioned<TDocument, TKey>(partitionKey);
+            return await collection.Aggregate()
+                             .Match(Builders<TDocument>.Filter.Where(filter))
+                             .Group(selector, projection)
+                             .ToListAsync(cancellationToken);
+        }
+
+        /// <summary>
+        /// Asynchronously returns a paginated list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="sortSelector">The property selector.</param>
+        /// <param name="ascending">Order of the sorting.</param>
+        /// <param name="skipNumber">The number of documents you want to skip. Default value is 0.</param>
+        /// <param name="takeNumber">The number of documents you want to take. Default value is 50.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public virtual async Task<List<TDocument>> GetSortedPaginatedAsync<TDocument, TKey>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, object>> sortSelector,
+            bool ascending = true,
+            int skipNumber = 0,
+            int takeNumber = 50,
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var sorting = ascending
+                ? Builders<TDocument>.Sort.Ascending(sortSelector)
+                : Builders<TDocument>.Sort.Descending(sortSelector);
+
+            return await HandlePartitioned<TDocument, TKey>(partitionKey)
+                                    .Find(filter)
+                                    .Sort(sorting)
+                                    .Skip(skipNumber)
+                                    .Limit(takeNumber)
+                                    .ToListAsync(cancellationToken);
+        }
+
+        /// <summary>
+        /// Asynchronously returns a paginated list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="sortDefinition">The sort definition.</param>
+        /// <param name="skipNumber">The number of documents you want to skip. Default value is 0.</param>
+        /// <param name="takeNumber">The number of documents you want to take. Default value is 50.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public virtual async Task<List<TDocument>> GetSortedPaginatedAsync<TDocument, TKey>(
+            Expression<Func<TDocument, bool>> filter,
+            SortDefinition<TDocument> sortDefinition,
+            int skipNumber = 0,
+            int takeNumber = 50,
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await HandlePartitioned<TDocument, TKey>(partitionKey)
+                                    .Find(filter)
+                                    .Sort(sortDefinition)
+                                    .Skip(skipNumber)
+                                    .Limit(takeNumber)
+                                    .ToListAsync(cancellationToken);
+        }
+    }
+}

MongoDbGenericRepository/DataAccess/Read/MongoDbReader.Project.cs

@@ -0,0 +1,101 @@
+using MongoDB.Driver;
+using MongoDB.Driver.Linq;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository.DataAccess.Read
+{
+    public partial class MongoDbReader
+    {
+        /// <summary>
+        /// Asynchronously returns a projected document matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public virtual async Task<TProjection> ProjectOneAsync<TDocument, TProjection, TKey>(
+            Expression<Func<TDocument, bool>> filter, 
+            Expression<Func<TDocument, TProjection>> projection, 
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class
+        {
+            return await HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter)
+                                                                         .Project(projection)
+                                                                         .FirstOrDefaultAsync(cancellationToken);
+        }
+
+        /// <summary>
+        /// Returns a projected document matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual TProjection ProjectOne<TDocument, TProjection, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class
+        {
+            return HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter)
+                                                                   .Project(projection)
+                                                                   .FirstOrDefault();
+        }
+
+        /// <summary>
+        /// Asynchronously returns a list of projected documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public virtual async Task<List<TProjection>> ProjectManyAsync<TDocument, TProjection, TKey>(
+            Expression<Func<TDocument, bool>> filter, 
+            Expression<Func<TDocument, TProjection>> projection, 
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class
+        {
+            return await HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter)
+                                                                   .Project(projection)
+                                                                   .ToListAsync(cancellationToken);
+        }
+
+        /// <summary>
+        /// Asynchronously returns a list of projected documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual List<TProjection> ProjectMany<TDocument, TProjection, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class
+        {
+            return HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter)
+                                                                   .Project(projection)
+                                                                   .ToList();
+        }
+    }
+}

MongoDbGenericRepository/DataAccess/Update/MongoDbUpdater.ClientSession.cs

@@ -0,0 +1,217 @@
+using MongoDB.Driver;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Linq.Expressions;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository.DataAccess.Update
+{
+    public partial class MongoDbUpdater
+    {
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns></returns>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey>(IClientSessionHandle session, TDocument modifiedDocument, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", modifiedDocument.Id);
+            var updateRes = await HandlePartitioned<TDocument, TKey>(modifiedDocument)
+                    .ReplaceOneAsync(session, filter, modifiedDocument, cancellationToken: cancellationToken)
+                    .ConfigureAwait(false);
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns></returns>
+        public virtual bool UpdateOne<TDocument, TKey>(IClientSessionHandle session, TDocument modifiedDocument, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", modifiedDocument.Id);
+            var updateRes = HandlePartitioned<TDocument, TKey>(modifiedDocument).ReplaceOne(session, filter, modifiedDocument, cancellationToken: cancellationToken);
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="documentToModify">The document to modify.</param>
+        /// <param name="update">The update definition.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns></returns>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey>(IClientSessionHandle session, TDocument documentToModify, UpdateDefinition<TDocument> update, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", documentToModify.Id);
+            var updateRes = await HandlePartitioned<TDocument, TKey>(documentToModify).UpdateOneAsync(session, filter, update, null, cancellationToken).ConfigureAwait(false);
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="documentToModify">The document to modify.</param>
+        /// <param name="update">The update definition.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns></returns>
+        public virtual bool UpdateOne<TDocument, TKey>(IClientSessionHandle session, TDocument documentToModify, UpdateDefinition<TDocument> update, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", documentToModify.Id);
+            var updateRes = HandlePartitioned<TDocument, TKey>(documentToModify).UpdateOne(session, filter, update, null, cancellationToken);
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param> 
+        /// <param name="documentToModify">The document to modify.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns></returns>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey, TField>(IClientSessionHandle session, TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", documentToModify.Id);
+            var updateRes = await HandlePartitioned<TDocument, TKey>(documentToModify)
+                    .UpdateOneAsync(session, filter, Builders<TDocument>.Update.Set(field, value), cancellationToken: cancellationToken)
+                    .ConfigureAwait(false);
+
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="documentToModify">The document to modify.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns></returns>
+        public virtual bool UpdateOne<TDocument, TKey, TField>(IClientSessionHandle session, TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", documentToModify.Id);
+            var updateRes = HandlePartitioned<TDocument, TKey>(documentToModify).UpdateOne(session, filter, Builders<TDocument>.Update.Set(field, value), cancellationToken: cancellationToken);
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="filter">The filter for the update.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="partitionKey">The optional partition key.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns></returns>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey, TField>(IClientSessionHandle session, FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var collection = string.IsNullOrEmpty(partitionKey) ? GetCollection<TDocument, TKey>() : GetCollection<TDocument, TKey>(partitionKey);
+            var updateRes = await collection.UpdateOneAsync(session, filter, Builders<TDocument>.Update.Set(field, value), cancellationToken: cancellationToken).ConfigureAwait(false);
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="filter">The filter for the update.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="partitionKey">The optional partition key.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns></returns>
+        public virtual Task<bool> UpdateOneAsync<TDocument, TKey, TField>(IClientSessionHandle session, Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return UpdateOneAsync<TDocument, TKey, TField>(session, Builders<TDocument>.Filter.Where(filter), field, value, partitionKey, cancellationToken);
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="filter">The filter for the update.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="partitionKey">The optional partition key.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns></returns>
+        public virtual bool UpdateOne<TDocument, TKey, TField>(IClientSessionHandle session, FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var collection = string.IsNullOrEmpty(partitionKey) ? GetCollection<TDocument, TKey>() : GetCollection<TDocument, TKey>(partitionKey);
+            var updateRes = collection.UpdateOne(session, filter, Builders<TDocument>.Update.Set(field, value), cancellationToken: cancellationToken);
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field to update.</typeparam>
+        /// <param name="session">The client session.</param>
+        /// <param name="filter">The filter for the update.</param>
+        /// <param name="field">The field to update.</param>
+        /// <param name="value">The value of the field.</param>
+        /// <param name="partitionKey">The optional partition key.</param>
+        /// <param name="cancellationToken">The optional cancellation token.</param>
+        /// <returns></returns>
+        public virtual bool UpdateOne<TDocument, TKey, TField>(IClientSessionHandle session, Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null, CancellationToken cancellationToken = default(CancellationToken))
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return UpdateOne<TDocument, TKey, TField>(session, Builders<TDocument>.Filter.Where(filter), field, value, partitionKey, cancellationToken);
+        }
+    }
+}

MongoDbGenericRepository/DataAccess/Update/MongoDbUpdater.cs

@@ -0,0 +1,311 @@
+using MongoDB.Driver;
+using MongoDbGenericRepository.DataAccess.Base;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Linq.Expressions;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository.DataAccess.Update
+{
+    public partial class MongoDbUpdater : DataAccessBase
+    {
+        public MongoDbUpdater(IMongoDbContext mongoDbContext) : base(mongoDbContext)
+        {
+        }
+
+        /// <summary>
+        /// Asynchronously Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey>(TDocument modifiedDocument)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", modifiedDocument.Id);
+            var updateRes = await HandlePartitioned<TDocument, TKey>(modifiedDocument).ReplaceOneAsync(filter, modifiedDocument);
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        public virtual bool UpdateOne<TDocument, TKey>(TDocument modifiedDocument)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", modifiedDocument.Id);
+            var updateRes = HandlePartitioned<TDocument, TKey>(modifiedDocument).ReplaceOne(filter, modifiedDocument);
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", documentToModify.Id);
+            var updateRes = await HandlePartitioned<TDocument, TKey>(documentToModify).UpdateOneAsync(filter, update);
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        public virtual bool UpdateOne<TDocument, TKey>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", documentToModify.Id);
+            var updateRes = HandlePartitioned<TDocument, TKey>(documentToModify).UpdateOne(filter, update);
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", documentToModify.Id);
+            var updateRes = await HandlePartitioned<TDocument, TKey>(documentToModify).UpdateOneAsync(filter, Builders<TDocument>.Update.Set(field, value));
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        public virtual bool UpdateOne<TDocument, TKey, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", documentToModify.Id);
+            var updateRes = HandlePartitioned<TDocument, TKey>(documentToModify).UpdateOne(filter, Builders<TDocument>.Update.Set(field, value));
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var collection = string.IsNullOrEmpty(partitionKey) ? GetCollection<TDocument, TKey>() : GetCollection<TDocument, TKey>(partitionKey);
+            var updateRes = await collection.UpdateOneAsync(filter, Builders<TDocument>.Update.Set(field, value));
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// For the entity selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await UpdateOneAsync<TDocument, TKey, TField>(Builders<TDocument>.Filter.Where(filter), field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual bool UpdateOne<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var collection = string.IsNullOrEmpty(partitionKey) ? GetCollection<TDocument, TKey>() : GetCollection<TDocument, TKey>(partitionKey);
+            var updateRes = collection.UpdateOne(filter, Builders<TDocument>.Update.Set(field, value));
+            return updateRes.ModifiedCount == 1;
+        }
+
+        /// <summary>
+        /// For the entity selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual bool UpdateOne<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return UpdateOne<TDocument, TKey, TField>(Builders<TDocument>.Filter.Where(filter), field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await UpdateManyAsync<TDocument, TKey, TField>(Builders<TDocument>.Filter.Where(filter), field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var collection = string.IsNullOrEmpty(partitionKey) ? GetCollection<TDocument, TKey>() : GetCollection<TDocument, TKey>(partitionKey);
+            var updateRes = await collection.UpdateManyAsync(filter, Builders<TDocument>.Update.Set(field, value));
+            return updateRes.ModifiedCount;
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, apply the update definition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, UpdateDefinition<TDocument> update, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await UpdateManyAsync<TDocument, TKey>(Builders<TDocument>.Filter.Where(filter), update, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, apply the update definition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument, TKey>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var collection = string.IsNullOrEmpty(partitionKey) ? GetCollection<TDocument, TKey>() : GetCollection<TDocument, TKey>(partitionKey);
+            var updateRes = await collection.UpdateManyAsync(filter, updateDefinition);
+            return updateRes.ModifiedCount;
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual long UpdateMany<TDocument, TKey, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return UpdateMany<TDocument, TKey, TField>(Builders<TDocument>.Filter.Where(filter), field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual long UpdateMany<TDocument, TKey, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var collection = string.IsNullOrEmpty(partitionKey) ? GetCollection<TDocument, TKey>() : GetCollection<TDocument, TKey>(partitionKey);
+            var updateRes = collection.UpdateMany(filter, Builders<TDocument>.Update.Set(field, value));
+            return updateRes.ModifiedCount;
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, apply the update definition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="UpdateDefinition">The update definition.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual long UpdateMany<TDocument, TKey>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> UpdateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var collection = string.IsNullOrEmpty(partitionKey) ? GetCollection<TDocument, TKey>() : GetCollection<TDocument, TKey>(partitionKey);
+            var updateRes = collection.UpdateMany(filter, UpdateDefinition);
+            return updateRes.ModifiedCount;
+        }
+    }
+}

MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Create.cs

@@ -0,0 +1,122 @@
+using MongoDbGenericRepository.DataAccess.Create;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository
+{
+    /// <summary>
+    /// The interface exposing data insertion functionality for Key typed repositories.
+    /// </summary>
+    /// <typeparam name="TKey"></typeparam>
+    public interface IBaseMongoRepository_Create<TKey> where TKey : IEquatable<TKey>
+    {
+        /// <summary>
+        /// Asynchronously adds a document to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="document">The document you want to add.</param>
+        Task AddOneAsync<TDocument>(TDocument document) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Adds a document to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="document">The document you want to add.</param>
+        void AddOne<TDocument>(TDocument document) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Asynchronously adds a list of documents to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documents">The documents you want to add.</param>
+        Task AddManyAsync<TDocument>(IEnumerable<TDocument> documents) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Adds a list of documents to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documents">The documents you want to add.</param>
+        void AddMany<TDocument>(IEnumerable<TDocument> documents) where TDocument : IDocument<TKey>;
+    }
+
+    /// <summary>
+    /// The base Repository, it is meant to be inherited from by your custom custom MongoRepository implementation.
+    /// Its constructor must be given a connection string and a database name.
+    /// </summary>
+    public abstract partial class BaseMongoRepository<TKey> : IBaseMongoRepository_Create<TKey> where TKey : IEquatable<TKey>
+    {
+        private MongoDbCreator _mongoDbCreator;
+
+        /// <summary>
+        /// The MongoDb accessor to insert data.
+        /// </summary>
+        protected virtual MongoDbCreator MongoDbCreator
+        {
+            get
+            {
+                if(_mongoDbCreator == null)
+                {
+                    lock (_initLock)
+                    {
+                        if(_mongoDbCreator == null)
+                        {
+                            _mongoDbCreator = new MongoDbCreator(MongoDbContext);
+                        }
+                    }
+                }
+                return _mongoDbCreator;
+            }
+            set { _mongoDbCreator = value; }
+        }
+
+        /// <summary>
+        /// Asynchronously adds a document to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="document">The document you want to add.</param>
+        public virtual async Task AddOneAsync<TDocument>(TDocument document) where TDocument : IDocument<TKey>
+        {
+            await MongoDbCreator.AddOneAsync<TDocument, TKey>(document);
+        }
+
+        /// <summary>
+        /// Adds a document to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="document">The document you want to add.</param>
+        public virtual void AddOne<TDocument>(TDocument document) where TDocument : IDocument<TKey>
+        {
+            MongoDbCreator.AddOne<TDocument, TKey>(document);
+        }
+
+        /// <summary>
+        /// Asynchronously adds a list of documents to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documents">The documents you want to add.</param>
+        public virtual async Task AddManyAsync<TDocument>(IEnumerable<TDocument> documents) where TDocument : IDocument<TKey>
+        {
+            await MongoDbCreator.AddManyAsync<TDocument, TKey>(documents);
+        }
+
+        /// <summary>
+        /// Adds a list of documents to the collection.
+        /// Populates the Id and AddedAtUtc fields if necessary.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documents">The documents you want to add.</param>
+        public virtual void AddMany<TDocument>(IEnumerable<TDocument> documents) where TDocument : IDocument<TKey>
+        {
+            MongoDbCreator.AddMany<TDocument, TKey>(documents);
+        }
+    }
+}

MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Delete.cs

@@ -0,0 +1,219 @@
+using MongoDbGenericRepository.DataAccess.Delete;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository
+{
+    /// <summary>
+    /// The interface exposing deletion functionality for Key typed repositories.
+    /// </summary>
+    /// <typeparam name="TKey">The type of the document Id.</typeparam>
+    public interface IBaseMongoRepository_Delete<TKey> where TKey : IEquatable<TKey>
+    {
+        /// <summary>
+        /// Deletes a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="document">The document you want to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        long DeleteOne<TDocument>(TDocument document)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="document">The document you want to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        Task<long> DeleteOneAsync<TDocument>(TDocument document)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        long DeleteOne<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        Task<long> DeleteOneAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Asynchronously deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        Task<long> DeleteManyAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Asynchronously deletes a list of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documents">The list of documents to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        Task<long> DeleteManyAsync<TDocument>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Deletes a list of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documents">The list of documents to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        long DeleteMany<TDocument>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        long DeleteMany<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+    }
+
+    public abstract partial class BaseMongoRepository<TKey>: IBaseMongoRepository_Delete<TKey> 
+        where TKey : IEquatable<TKey>
+    {
+        private MongoDbEraser _mongoDbEraser;
+
+        /// <summary>
+        /// The MongoDb accessor to delete data.
+        /// </summary>
+        protected virtual MongoDbEraser MongoDbEraser
+        {
+            get
+            {
+                if (_mongoDbEraser != null) { return _mongoDbEraser; }
+
+                lock (_initLock)
+                {
+                    if (_mongoDbEraser == null)
+                    {
+                        _mongoDbEraser = new MongoDbEraser(MongoDbContext);
+                    }
+                }
+                return _mongoDbEraser;
+            }
+            set { _mongoDbEraser = value; }
+        }
+
+        /// <summary>
+        /// Deletes a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="document">The document you want to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteOne<TDocument>(TDocument document)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbEraser.DeleteOne<TDocument, TKey>(document);
+        }
+
+        /// <summary>
+        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="document">The document you want to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteOneAsync<TDocument>(TDocument document)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbEraser.DeleteOneAsync<TDocument, TKey>(document);
+        }
+
+        /// <summary>
+        /// Deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteOne<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbEraser.DeleteOne<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously deletes a document matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteOneAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbEraser.DeleteOneAsync<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteManyAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbEraser.DeleteManyAsync<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously deletes a list of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documents">The list of documents to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual async Task<long> DeleteManyAsync<TDocument>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbEraser.DeleteManyAsync<TDocument, TKey>(documents);
+        }
+
+        /// <summary>
+        /// Deletes a list of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documents">The list of documents to delete.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteMany<TDocument>(IEnumerable<TDocument> documents)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbEraser.DeleteMany<TDocument, TKey>(documents);
+        }
+
+        /// <summary>
+        /// Deletes the documents matching the condition of the LINQ expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The number of documents deleted.</returns>
+        public virtual long DeleteMany<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbEraser.DeleteMany<TDocument, TKey>(filter, partitionKey);
+        }
+    }
+}

MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Index.cs

@@ -0,0 +1,234 @@
+using MongoDbGenericRepository.DataAccess.Index;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository
+{
+    /// <summary>
+    /// The interface exposing index management functionality for Key typed repositories.
+    /// </summary>
+    /// <typeparam name="TKey"></typeparam>
+    public interface IBaseMongoRepository_Index<TKey> where TKey : IEquatable<TKey>
+    {
+        /// <summary>
+        /// Returns the names of the indexes present on a collection.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="partitionKey">An optional partition key</param>
+        /// <returns>A list containing the names of the indexes on on the concerned collection.</returns>
+        Task<List<string>> GetIndexesNamesAsync<TDocument>(string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Create a text index on the given field.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        Task<string> CreateTextIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Creates an index on the given field in ascending order.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        Task<string> CreateAscendingIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Creates an index on the given field in descending order.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        Task<string> CreateDescendingIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Creates a hashed index on the given field.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        Task<string> CreateHashedIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Creates a combined text index.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="fields">The fields we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        Task<string> CreateCombinedTextIndexAsync<TDocument>(IEnumerable<Expression<Func<TDocument, object>>> fields, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Drops the index given a field name
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="indexName">The name of the index</param>
+        /// <param name="partitionKey">An optional partition key</param>
+        Task DropIndexAsync<TDocument>(string indexName, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+    }
+
+    /// <summary>
+    /// The base Repository, it is meant to be inherited from by your custom custom MongoRepository implementation.
+    /// Its constructor must be given a connection string and a database name.
+    /// </summary>
+    public abstract partial class BaseMongoRepository<TKey> : IBaseMongoRepository_Index<TKey>
+        where TKey : IEquatable<TKey>
+    {
+        private MongoDbIndexHandler _mongoDbIndexHandler;
+
+        /// <summary>
+        /// The MongoDb accessor to manage indexes.
+        /// </summary>
+        protected virtual MongoDbIndexHandler MongoDbIndexHandler
+        {
+            get
+            {
+                if (_mongoDbIndexHandler != null) { return _mongoDbIndexHandler; }
+
+                lock (_initLock)
+                {
+                    if (_mongoDbIndexHandler == null)
+                    {
+                        _mongoDbIndexHandler = new MongoDbIndexHandler(MongoDbContext);
+                    }
+                }
+                return _mongoDbIndexHandler;
+            }
+            set { _mongoDbIndexHandler = value; }
+        }
+
+        /// <summary>
+        /// Returns the names of the indexes present on a collection.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="partitionKey">An optional partition key</param>
+        /// <returns>A list containing the names of the indexes on on the concerned collection.</returns>
+        public async virtual Task<List<string>> GetIndexesNamesAsync<TDocument>(string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbIndexHandler.GetIndexesNamesAsync<TDocument, TKey>(partitionKey);
+        }
+
+        /// <summary>
+        /// Create a text index on the given field.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async virtual Task<string> CreateTextIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbIndexHandler.CreateTextIndexAsync<TDocument, TKey>(field, indexCreationOptions, partitionKey);
+        }
+
+        /// <summary>
+        /// Creates an index on the given field in ascending order.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async virtual Task<string> CreateAscendingIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbIndexHandler.CreateAscendingIndexAsync<TDocument, TKey>(field, indexCreationOptions, partitionKey);
+        }
+
+        /// <summary>
+        /// Creates an index on the given field in descending order.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async virtual Task<string> CreateDescendingIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbIndexHandler.CreateDescendingIndexAsync<TDocument, TKey>(field, indexCreationOptions, partitionKey);
+        }
+
+        /// <summary>
+        /// Creates a hashed index on the given field.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="field">The field we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async virtual Task<string> CreateHashedIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbIndexHandler.CreateHashedIndexAsync<TDocument, TKey>(field, indexCreationOptions, partitionKey);
+        }
+
+        /// <summary>
+        /// Creates a combined text index.
+        /// IndexCreationOptions can be supplied to further specify 
+        /// how the creation should be done.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="fields">The fields we want to index.</param>
+        /// <param name="indexCreationOptions">Options for creating an index.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <returns>The result of the create index operation.</returns>
+        public async virtual Task<string> CreateCombinedTextIndexAsync<TDocument>(IEnumerable<Expression<Func<TDocument, object>>> fields, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbIndexHandler.CreateCombinedTextIndexAsync<TDocument, TKey>(fields, indexCreationOptions, partitionKey);
+        }
+
+        /// <summary>
+        /// Drops the index given a field name
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="indexName">The name of the index</param>
+        /// <param name="partitionKey">An optional partition key</param>
+        public async virtual Task DropIndexAsync<TDocument>(string indexName, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            await MongoDbIndexHandler.DropIndexAsync<TDocument, TKey>(indexName, partitionKey);
+        }
+    }
+}

MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Main.cs

@@ -0,0 +1,87 @@
+using MongoDB.Driver;
+using MongoDbGenericRepository.Models;
+using System;
+
+namespace MongoDbGenericRepository
+{
+    /// <summary>
+    /// The interface exposing all the CRUD and Index functionalities for Key typed repositories.
+    /// </summary>
+    /// <typeparam name="TKey">The type of the document Id.</typeparam>
+    public interface IBaseMongoRepository<TKey> :
+        IReadOnlyMongoRepository<TKey>,
+        IBaseMongoRepository_Create<TKey>,
+        IBaseMongoRepository_Delete<TKey>,
+        IBaseMongoRepository_Index<TKey>,
+        IBaseMongoRepository_Update<TKey>
+        where TKey : IEquatable<TKey>
+    {
+    }
+
+    /// <summary>
+    /// The base Repository, it is meant to be inherited from by your custom custom MongoRepository implementation.
+    /// Its constructor must be given a connection string and a database name.
+    /// </summary>
+    /// <typeparam name="TKey">The type of the document Id.</typeparam>
+    public abstract partial class BaseMongoRepository<TKey> : 
+        ReadOnlyMongoRepository<TKey>, 
+        IBaseMongoRepository<TKey>
+        where TKey : IEquatable<TKey>
+    {
+
+        private readonly object _initLock = new object();
+
+        /// <summary>
+        /// The constructor taking a connection string and a database name.
+        /// </summary>
+        /// <param name="connectionString">The connection string of the MongoDb server.</param>
+        /// <param name="databaseName">The name of the database against which you want to perform operations.</param>
+        protected BaseMongoRepository(string connectionString, string databaseName = null) : base(connectionString, databaseName)
+        {
+        }
+
+        /// <summary>
+        /// The contructor taking a <see cref="IMongoDbContext"/>.
+        /// </summary>
+        /// <param name="mongoDbContext">A mongodb context implementing <see cref="IMongoDbContext"/></param>
+        protected BaseMongoRepository(IMongoDbContext mongoDbContext) : base(mongoDbContext)
+        {
+        }
+
+        /// <summary>
+        /// The contructor taking a <see cref="IMongoDatabase"/>.
+        /// </summary>
+        /// <param name="mongoDatabase">A mongodb context implementing <see cref="IMongoDatabase"/></param>
+        protected BaseMongoRepository(IMongoDatabase mongoDatabase) : base(mongoDatabase)
+        {
+        }
+
+        /// <summary>
+        /// Gets a collections for a potentially partitioned document type.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="partitionKey">The collection partition key.</param>
+        /// <returns></returns>
+        protected virtual IMongoCollection<TDocument> HandlePartitioned<TDocument>(string partitionKey)
+            where TDocument : IDocument<TKey>
+        {
+            if (!string.IsNullOrEmpty(partitionKey))
+            {
+                return GetCollection<TDocument>(partitionKey);
+            }
+            return GetCollection<TDocument>();
+        }
+
+        /// <summary>
+        /// Gets a collections for the type TDocument with a partition key.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="partitionKey">The collection partition key.</param>
+        /// <returns></returns>
+        protected virtual IMongoCollection<TDocument> GetCollection<TDocument>(string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbContext.GetCollection<TDocument>(partitionKey);
+        }
+    }
+}

MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.ReadOnly.cs

@@ -0,0 +1,531 @@
+using MongoDB.Driver;
+using MongoDbGenericRepository.DataAccess.Read;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository
+{
+    /// <summary>
+    /// The base Repository, it is meant to be inherited from by your custom custom MongoRepository implementation.
+    /// Its constructor must be given a connection string and a database name.
+    /// </summary>
+    public abstract partial class ReadOnlyMongoRepository<TKey> : IReadOnlyMongoRepository<TKey> where TKey : IEquatable<TKey>
+    {
+        /// <summary>
+        /// The connection string.
+        /// </summary>
+        public string ConnectionString { get; protected set; }
+
+        /// <summary>
+        /// The database name.
+        /// </summary>
+        public string DatabaseName { get; protected set; }
+
+        /// <summary>
+        /// The MongoDbContext
+        /// </summary>
+        protected IMongoDbContext MongoDbContext = null;
+
+        /// <summary>
+        /// A MongoDb Reader for read operations
+        /// </summary>
+        protected MongoDbReader MongoDbReader = null;
+
+        /// <summary>
+        /// The constructor taking a connection string and a database name.
+        /// </summary>
+        /// <param name="connectionString">The connection string of the MongoDb server.</param>
+        /// <param name="databaseName">The name of the database against which you want to perform operations.</param>
+        protected ReadOnlyMongoRepository(string connectionString, string databaseName = null)
+        {
+            SetupMongoDbContext(connectionString, databaseName);
+        }
+
+        /// <summary>
+        /// The contructor taking a <see cref="IMongoDatabase"/>.
+        /// </summary>
+        /// <param name="mongoDatabase">A mongodb context implementing <see cref="IMongoDatabase"/></param>
+        protected ReadOnlyMongoRepository(IMongoDatabase mongoDatabase) : this(new MongoDbContext(mongoDatabase))
+        {
+        }
+
+        /// <summary>
+        /// The contructor taking a <see cref="IMongoDbContext"/>.
+        /// </summary>
+        /// <param name="mongoDbContext">A mongodb context implementing <see cref="IMongoDbContext"/></param>
+        protected ReadOnlyMongoRepository(IMongoDbContext mongoDbContext)
+        {
+            SetupMongoDbContext(mongoDbContext);
+        }
+
+        protected void SetupMongoDbContext(IMongoDbContext mongoDbContext)
+        {
+            MongoDbContext = MongoDbContext ?? mongoDbContext;
+            MongoDbReader = MongoDbReader ?? new MongoDbReader(MongoDbContext);
+        }
+
+        protected void SetupMongoDbContext(string connectionString, string databaseName)
+        {
+            if (databaseName == null)
+            {
+                var mongoUrl = new MongoUrl(connectionString);
+                databaseName = databaseName ?? mongoUrl.DatabaseName;
+            }
+            ConnectionString = connectionString;
+            DatabaseName = databaseName;
+            SetupMongoDbContext(new MongoDbContext(connectionString, databaseName));
+        }
+
+        #region Read
+
+        /// <summary>
+        /// Asynchronously returns one document given its id.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="id">The Id of the document you want to get.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public async Task<TDocument> GetByIdAsync<TDocument>(TKey id, string partitionKey = null) where TDocument : IDocument<TKey>
+        {
+            return await MongoDbReader.GetByIdAsync<TDocument, TKey>(id, partitionKey);
+        }
+
+        /// <summary>
+        /// Returns one document given its id.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="id">The Id of the document you want to get.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public TDocument GetById<TDocument>(TKey id, string partitionKey = null) where TDocument : IDocument<TKey>
+        {
+            return MongoDbReader.GetById<TDocument, TKey>(id, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously returns one document given an expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public async Task<TDocument> GetOneAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>
+        {
+            return await MongoDbReader.GetOneAsync<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Returns one document given an expression filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public TDocument GetOne<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>
+        {
+            return MongoDbReader.GetOne<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Returns a collection cursor.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public IFindFluent<TDocument, TDocument> GetCursor<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>
+        {
+            return MongoDbReader.GetCursor<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Returns true if any of the document of the collection matches the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public async Task<bool> AnyAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>
+        {
+            return await MongoDbReader.AnyAsync<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Returns true if any of the document of the collection matches the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public bool Any<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>
+        {
+            return MongoDbReader.Any<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously returns a list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public async Task<List<TDocument>> GetAllAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>
+        {
+            return await MongoDbReader.GetAllAsync<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Returns a list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public List<TDocument> GetAll<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>
+        {
+            return MongoDbReader.GetAll<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously counts how many documents match the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partitionKey</param>
+        public async Task<long> CountAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>
+        {
+            return await MongoDbReader.CountAsync<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Counts how many documents match the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="partitionKey">An optional partitionKey</param>
+        public long Count<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>
+        {
+            return MongoDbReader.Count<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by descending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        public async Task<TDocument> GetByMaxAsync<TDocument>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> maxValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbReader.GetByMaxAsync<TDocument, TKey>(filter, maxValueSelector, partitionKey);
+        }
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by descending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        /// <returns></returns>
+        public TDocument GetByMax<TDocument>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> maxValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbReader.GetByMax<TDocument, TKey>(filter, maxValueSelector, partitionKey);
+        }
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        public async Task<TDocument> GetByMinAsync<TDocument>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> minValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbReader.GetByMinAsync<TDocument, TKey>(filter, minValueSelector, partitionKey);
+        }
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        public TDocument GetByMin<TDocument>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> minValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbReader.GetByMin<TDocument, TKey>(filter, minValueSelector, partitionKey);
+        }
+
+        /// <summary>
+        /// Gets the maximum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        public async Task<TValue> GetMaxValueAsync<TDocument, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> maxValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbReader.GetMaxValueAsync<TDocument, TKey, TValue>(filter, maxValueSelector, partitionKey);
+        }
+
+        /// <summary>
+        /// Gets the maximum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        public TValue GetMaxValue<TDocument, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> maxValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbReader.GetMaxValue<TDocument, TKey, TValue>(filter, maxValueSelector, partitionKey);
+        }
+
+        /// <summary>
+        /// Gets the minimum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual async Task<TValue> GetMinValueAsync<TDocument, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> minValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbReader.GetMinValueAsync<TDocument, TKey, TValue>(filter, minValueSelector, partitionKey);
+        }
+
+        /// <summary>
+        /// Gets the minimum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual TValue GetMinValue<TDocument, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> minValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbReader.GetMinValue<TDocument, TKey, TValue>(filter, minValueSelector, partitionKey);
+        }
+
+        #endregion
+
+        #region Maths
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual async Task<int> SumByAsync<TDocument>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, int>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbReader.SumByAsync<TDocument, TKey>(filter, selector, partitionKey);
+        }
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual async Task<decimal> SumByAsync<TDocument>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, decimal>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbReader.SumByAsync<TDocument, TKey>(filter, selector, partitionKey);
+        }
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual int SumBy<TDocument>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, int>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbReader.SumBy<TDocument, TKey>(filter, selector, partitionKey);
+        }
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual decimal SumBy<TDocument>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, decimal>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbReader.SumBy<TDocument, TKey>(filter, selector, partitionKey);
+        }
+
+        #endregion Maths
+
+        #region Project
+
+        /// <summary>
+        /// Asynchronously returns a projected document matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual async Task<TProjection> ProjectOneAsync<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TProjection : class
+        {
+            return await MongoDbReader.ProjectOneAsync<TDocument, TProjection, TKey>(filter, projection, partitionKey);
+        }
+
+        /// <summary>
+        /// Returns a projected document matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual TProjection ProjectOne<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TProjection : class
+        {
+            return MongoDbReader.ProjectOne<TDocument, TProjection, TKey>(filter, projection, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously returns a list of projected documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual async Task<List<TProjection>> ProjectManyAsync<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TProjection : class
+        {
+            return await MongoDbReader.ProjectManyAsync<TDocument, TProjection, TKey>(filter, projection, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously returns a list of projected documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual List<TProjection> ProjectMany<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TProjection : class
+        {
+            return MongoDbReader.ProjectMany<TDocument, TProjection, TKey>(filter, projection, partitionKey);
+        }
+
+
+        #endregion Project
+
+        /// <summary>
+        /// Groups a collection of documents given a grouping criteria, 
+        /// and returns a dictionary of listed document groups with keys having the different values of the grouping criteria.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TGroupKey">The type of the grouping criteria.</typeparam>
+        /// <typeparam name="TProjection">The type of the projected group.</typeparam>
+        /// <param name="groupingCriteria">The grouping criteria.</param>
+        /// <param name="groupProjection">The projected group result.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual List<TProjection> GroupBy<TDocument, TGroupKey, TProjection>(
+            Expression<Func<TDocument, TGroupKey>> groupingCriteria,
+            Expression<Func<IGrouping<TGroupKey, TDocument>, TProjection>> groupProjection,
+            string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TProjection : class, new()
+        {
+            return MongoDbReader.GroupBy<TDocument, TGroupKey, TProjection, TKey>(groupingCriteria, groupProjection, partitionKey);
+        }
+
+        /// <summary>
+        /// Groups filtered a collection of documents given a grouping criteria, 
+        /// and returns a dictionary of listed document groups with keys having the different values of the grouping criteria.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TGroupKey">The type of the grouping criteria.</typeparam>
+        /// <typeparam name="TProjection">The type of the projected group.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="groupingCriteria">The grouping criteria.</param>
+        /// <param name="groupProjection">The projected group result.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual List<TProjection> GroupBy<TDocument, TGroupKey, TProjection>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, TGroupKey>> groupingCriteria,
+            Expression<Func<IGrouping<TGroupKey, TDocument>, TProjection>> groupProjection,
+            string partitionKey = null)
+                where TDocument : IDocument<TKey>
+                where TProjection : class, new()
+        {
+            return MongoDbReader.GroupBy<TDocument, TGroupKey, TProjection, TKey>(filter, groupingCriteria, groupProjection, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously returns a paginated list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="sortSelector">The property selector.</param>
+        /// <param name="ascending">Order of the sorting.</param>
+        /// <param name="skipNumber">The number of documents you want to skip. Default value is 0.</param>
+        /// <param name="takeNumber">The number of documents you want to take. Default value is 50.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual async Task<List<TDocument>> GetSortedPaginatedAsync<TDocument>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, object>> sortSelector,
+            bool ascending = true,
+            int skipNumber = 0,
+            int takeNumber = 50,
+            string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbReader.GetSortedPaginatedAsync<TDocument, TKey>(filter, sortSelector, ascending, skipNumber, takeNumber, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously returns a paginated list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="sortDefinition">The sort definition.</param>
+        /// <param name="skipNumber">The number of documents you want to skip. Default value is 0.</param>
+        /// <param name="takeNumber">The number of documents you want to take. Default value is 50.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual async Task<List<TDocument>> GetSortedPaginatedAsync<TDocument>(
+            Expression<Func<TDocument, bool>> filter,
+            SortDefinition<TDocument> sortDefinition,
+            int skipNumber = 0,
+            int takeNumber = 50,
+            string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbReader.GetSortedPaginatedAsync<TDocument, TKey>(filter, sortDefinition, skipNumber, takeNumber, partitionKey);
+        }
+    }
+}

MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Update.cs

@@ -0,0 +1,469 @@
+using MongoDB.Driver;
+using MongoDbGenericRepository.DataAccess.Update;
+using MongoDbGenericRepository.Models;
+using System;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository
+{
+    public interface IBaseMongoRepository_Update<TKey> where TKey : IEquatable<TKey>
+    {
+        /// <summary>
+        /// Asynchronously Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        Task<bool> UpdateOneAsync<TDocument>(TDocument modifiedDocument) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        bool UpdateOne<TDocument>(TDocument modifiedDocument) where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        Task<bool> UpdateOneAsync<TDocument>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        bool UpdateOne<TDocument>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        bool UpdateOne<TDocument, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        Task<bool> UpdateOneAsync<TDocument, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        bool UpdateOne<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// For the entity selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        bool UpdateOne<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        Task<bool> UpdateOneAsync<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// For the entity selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        Task<bool> UpdateOneAsync<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        Task<long> UpdateManyAsync<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        Task<long> UpdateManyAsync<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        Task<long> UpdateManyAsync<TDocument>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        Task<long> UpdateManyAsync<TDocument>(Expression<Func<TDocument, bool>> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        long UpdateMany<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        long UpdateMany<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        long UpdateMany<TDocument>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        long UpdateMany<TDocument>(Expression<Func<TDocument, bool>> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>;
+    }
+
+    public abstract partial class BaseMongoRepository<TKey> : IBaseMongoRepository_Update<TKey>
+        where TKey : IEquatable<TKey>
+    {
+        private MongoDbUpdater _mongoDbUpdater;
+        protected virtual MongoDbUpdater MongoDbUpdater
+        {
+            get
+            {
+                if (_mongoDbUpdater != null) { return _mongoDbUpdater; }
+
+                lock (_initLock)
+                {
+                    if (_mongoDbUpdater == null)
+                    {
+                        _mongoDbUpdater = new MongoDbUpdater(MongoDbContext);
+                    }
+                }
+
+                return _mongoDbUpdater;
+            }
+            set { _mongoDbUpdater = value; }
+        }
+
+        /// <summary>
+        /// Asynchronously Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument>(TDocument modifiedDocument) where TDocument : IDocument<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey>(modifiedDocument);
+        }
+
+        /// <summary>
+        /// Updates a document.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="modifiedDocument">The document with the modifications you want to persist.</param>
+        public virtual bool UpdateOne<TDocument>(TDocument modifiedDocument) where TDocument : IDocument<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey>(modifiedDocument);
+        }
+
+        /// <summary>
+        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey>(documentToModify, update);
+        }
+
+        /// <summary>
+        /// Takes a document you want to modify and applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        public virtual bool UpdateOne<TDocument>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey>(documentToModify, update);
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        public virtual bool UpdateOne<TDocument, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey, TField>(documentToModify, field, value);
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey, TField>(documentToModify, field, value);
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual bool UpdateOne<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entity selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual bool UpdateOne<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbUpdater.UpdateOne<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// Updates the property field with the given value update a property field in entities.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entity selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual async Task<bool> UpdateOneAsync<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbUpdater.UpdateOneAsync<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbUpdater.UpdateManyAsync<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbUpdater.UpdateManyAsync<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbUpdater.UpdateManyAsync<TDocument, TKey>(filter, updateDefinition, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual async Task<long> UpdateManyAsync<TDocument>(Expression<Func<TDocument, bool>> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return await MongoDbUpdater.UpdateManyAsync<TDocument, TKey>(filter, updateDefinition, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The partition key for the document.</param>
+        public virtual long UpdateMany<TDocument, TField>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbUpdater.UpdateMany<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, updates the property field with the given value.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TField">The type of the field.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="field">The field selector.</param>
+        /// <param name="value">The new value of the property field.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual long UpdateMany<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbUpdater.UpdateMany<TDocument, TKey, TField>(filter, field, value, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual long UpdateMany<TDocument>(FilterDefinition<TDocument> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+        {
+            return MongoDbUpdater.UpdateMany<TDocument, TKey>(filter, updateDefinition, partitionKey);
+        }
+
+        /// <summary>
+        /// For the entities selected by the filter, applies the update you have defined in MongoDb.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="updateDefinition">The update definition to apply.</param>
+        /// <param name="partitionKey">The value of the partition key.</param>
+        public virtual long UpdateMany<TDocument>(Expression<Func<TDocument, bool>> filter, UpdateDefinition<TDocument> updateDefinition, string partitionKey = null) where TDocument : IDocument<TKey>
+        {
+            return MongoDbUpdater.UpdateMany<TDocument, TKey>(filter, updateDefinition, partitionKey);
+        }
+    }
+}

MongoDbGenericRepository/Models/IDocument.cs

@@ -1,5 +1,4 @@
-using MongoDB.Bson.Serialization.Attributes;
-using System;
+using System;
 
 namespace MongoDbGenericRepository.Models
 {

MongoDbGenericRepository/Models/IndexCreationOptions.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MongoDbGenericRepository.Models
+{
+    /// <summary>
+    /// Options for creating an index.
+    /// </summary>
+    public class IndexCreationOptions
+    {
+        /// <summary>
+        /// Gets or sets a value indicating whether the index is a unique index.
+        /// </summary> 
+        public bool? Unique { get; set; }
+        /// <summary>
+        /// Gets or sets the index version for text indexes.
+        /// </summary>  
+        public int? TextIndexVersion { get; set; }
+        /// <summary>
+        /// Gets or sets the index version for 2dsphere indexes.
+        /// </summary>
+        public int? SphereIndexVersion { get; set; }
+        /// <summary>
+        /// Gets or sets a value indicating whether the index is a sparse index.
+        /// </summary>   
+        public bool? Sparse { get; set; }
+        /// <summary>
+        /// Gets or sets the index name.
+        /// </summary>  
+        public string Name { get; set; }
+        /// <summary>
+        /// Gets or sets the min value for 2d indexes.
+        /// </summary>   
+        public double? Min { get; set; }
+        /// <summary>
+        /// Gets or sets the max value for 2d indexes.
+        /// </summary>
+        public double? Max { get; set; }
+        /// <summary>
+        /// Gets or sets the language override.
+        /// </summary>   
+        public string LanguageOverride { get; set; }
+        /// <summary>
+        /// Gets or sets when documents expire (used with TTL indexes).
+        /// </summary> 
+        public TimeSpan? ExpireAfter { get; set; }
+        /// <summary>
+        /// Gets or sets the default language.
+        /// </summary>  
+        public string DefaultLanguage { get; set; }
+        /// <summary>
+        /// Gets or sets the precision, in bits, used with geohash indexes.
+        /// </summary>   
+        public int? Bits { get; set; }
+        /// <summary>
+        /// Gets or sets a value indicating whether to create the index in the background.
+        /// </summary> 
+        public bool? Background { get; set; }
+        /// <summary>
+        /// Gets or sets the version of the index.
+        /// </summary>   
+        public int? Version { get; set; }
+    }
+}

MongoDbGenericRepository/MongoDbContext.cs

@@ -1,8 +1,6 @@
 using MongoDB.Driver;
 using MongoDbGenericRepository.Attributes;
-using MongoDbGenericRepository.Models;
 using MongoDbGenericRepository.Utils;
-using System;
 using System.Linq;
 using System.Reflection;
 
@@ -14,36 +12,24 @@ namespace MongoDbGenericRepository
     public class MongoDbContext : IMongoDbContext
     {
         /// <summary>
-        /// The IMongoClient from the official MongoDb driver
+        /// The IMongoClient from the official MongoDB driver
         /// </summary>
         public IMongoClient Client { get; }
 
         /// <summary>
-        /// The IMongoDatabase from the official Mongodb driver
+        /// The IMongoDatabase from the official MongoDB driver
         /// </summary>
         public IMongoDatabase Database { get; }
 
-        static MongoDbContext()
-        {
-            // Avoid legacy UUID representation: use Binary 0x04 subtype.
-            MongoDefaults.GuidRepresentation = MongoDB.Bson.GuidRepresentation.Standard;
-        }
 
         /// <summary>
-        /// Sets the Guid representation of the MongoDb Driver.
-        /// </summary>
-        /// <param name="guidRepresentation">The new value of the GuidRepresentation</param>
-        public void SetGuidRepresentation(MongoDB.Bson.GuidRepresentation guidRepresentation)
-        {
-            MongoDefaults.GuidRepresentation = guidRepresentation;
-        }
-
-        /// <summary>
-        /// The constructor of the MongoDbContext, it needs a an object implementing <see cref="IMongoDatabase"/>.
+        /// The constructor of the MongoDbContext, it needs an object implementing <see cref="IMongoDatabase"/>.
         /// </summary>
         /// <param name="mongoDatabase">An object implementing IMongoDatabase</param>
         public MongoDbContext(IMongoDatabase mongoDatabase)
         {
+            // Avoid legacy UUID representation: use Binary 0x04 subtype.
+            InitializeGuidRepresentation();
             Database = mongoDatabase;
             Client = Database.Client;
         }
@@ -55,16 +41,66 @@ namespace MongoDbGenericRepository
         /// <param name="databaseName">The name of your database.</param>
         public MongoDbContext(string connectionString, string databaseName)
         {
+            InitializeGuidRepresentation();
             Client = new MongoClient(connectionString);
             Database = Client.GetDatabase(databaseName);
         }
 
+        /// <summary>
+        /// Initialise an instance of a <see cref="IMongoDbContext"/> using a connection string
+        /// </summary>
+        /// <param name="connectionString"></param>
+        public MongoDbContext(string connectionString)
+            : this(connectionString, new MongoUrl(connectionString).DatabaseName)
+        {
+        }
+
+        /// <summary>
+        /// The constructor of the MongoDbContext, it needs a connection string and a database name. 
+        /// </summary>
+        /// <param name="client">The MongoClient.</param>
+        /// <param name="databaseName">The name of your database.</param>
+        public MongoDbContext(MongoClient client, string databaseName)
+        {
+            InitializeGuidRepresentation();
+            Client = client;
+            Database = client.GetDatabase(databaseName);
+        }
+
+        /// <summary>
+        /// Returns a collection for a document type. Also handles document types with a partition key.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <param name="partitionKey">The optional value of the partition key.</param>
+        public virtual IMongoCollection<TDocument> GetCollection<TDocument>(string partitionKey = null)
+        {
+            return Database.GetCollection<TDocument>(GetCollectionName<TDocument>(partitionKey));
+        }
+
+        /// <summary>
+        /// Drops a collection, use very carefully.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        public virtual void DropCollection<TDocument>(string partitionKey = null)
+        {
+            Database.DropCollection(GetCollectionName<TDocument>(partitionKey));
+        }
+
+        /// <summary>
+        /// Sets the Guid representation of the MongoDB Driver.
+        /// </summary>
+        /// <param name="guidRepresentation">The new value of the GuidRepresentation</param>
+        public virtual void SetGuidRepresentation(MongoDB.Bson.GuidRepresentation guidRepresentation)
+        {
+            MongoDefaults.GuidRepresentation = guidRepresentation;
+        }
+
         /// <summary>
         /// Extracts the CollectionName attribute from the entity type, if any.
         /// </summary>
         /// <typeparam name="TDocument">The type representing a Document.</typeparam>
         /// <returns>The name of the collection in which the TDocument is stored.</returns>
-        private string GetAttributeCollectionName<TDocument>()
+        protected virtual string GetAttributeCollectionName<TDocument>()
         {
             return (typeof(TDocument).GetTypeInfo()
                                      .GetCustomAttributes(typeof(CollectionNameAttribute))
@@ -72,60 +108,37 @@ namespace MongoDbGenericRepository
         }
 
         /// <summary>
-		/// Returns a collection for a document type that has a partition key.
+        /// Initialize the Guid representation of the MongoDB Driver.
+        /// Override this method to change the default GuidRepresentation.
+        /// </summary>
+        protected virtual void InitializeGuidRepresentation()
+        {
+            // by default, avoid legacy UUID representation: use Binary 0x04 subtype.
+            MongoDefaults.GuidRepresentation = MongoDB.Bson.GuidRepresentation.Standard;
+        }
+
+        /// <summary>
+        /// Given the document type and the partition key, returns the name of the collection it belongs to.
         /// </summary>
         /// <typeparam name="TDocument">The type representing a Document.</typeparam>
 	    /// <param name="partitionKey">The value of the partition key.</param>
-		public IMongoCollection<TDocument> GetCollection<TDocument>(string partitionKey = null) where TDocument : IDocument
+        /// <returns>The name of the collection.</returns>
+        protected virtual string GetCollectionName<TDocument>(string partitionKey)
         {
+            var collectionName = GetAttributeCollectionName<TDocument>() ?? Pluralize<TDocument>();
             if (string.IsNullOrEmpty(partitionKey))
             {
-                return Database.GetCollection<TDocument>(GetAttributeCollectionName<TDocument>() ?? Pluralize<TDocument>());
+                return collectionName;
             }
-			return Database.GetCollection<TDocument>(partitionKey + "-" + GetAttributeCollectionName<TDocument>() ?? Pluralize<TDocument>());
-        }
-
-        /// <summary>
-        /// Returns a collection for a document type that has a partition key.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
-        /// <param name="partitionKey">The value of the partition key.</param>
-        public IMongoCollection<TDocument> GetCollection<TDocument, TKey>(string partitionKey) 
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>
-        {
-            if (string.IsNullOrEmpty(partitionKey))
-            {
-                return Database.GetCollection<TDocument>(GetAttributeCollectionName<TDocument>() ?? Pluralize<TDocument>());
-            }
-            return Database.GetCollection<TDocument>(partitionKey + "-" + GetAttributeCollectionName<TDocument>() ?? Pluralize<TDocument>());
-        }
-
-		/// <summary>
-		/// Drops a collection, use very carefully.
-		/// </summary>
-		/// <typeparam name="TDocument">The type representing a Document.</typeparam>
-		public void DropCollection<TDocument>()
-        {
-			Database.DropCollection(GetAttributeCollectionName<TDocument>() ?? Pluralize<TDocument>());
-        }
-
-        /// <summary>
-        /// Drops a collection having a partitionkey, use very carefully.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        public void DropCollection<TDocument>(string partitionKey)
-        {
-			Database.DropCollection(partitionKey + "-" + GetAttributeCollectionName<TDocument>() ?? Pluralize<TDocument>());
+            return $"{partitionKey}-{collectionName}";
         }
 
         /// <summary>
         /// Very naively pluralizes a TDocument type name.
         /// </summary>
         /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <returns></returns>
-        private string Pluralize<TDocument>()
+        /// <returns>The pluralized document name.</returns>
+        protected virtual string Pluralize<TDocument>()
         {
             return (typeof(TDocument).Name.Pluralize()).Camelize();
         }

MongoDbGenericRepository/MongoDbGenericRepository.csproj

@@ -1,23 +1,31 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net45;netstandard1.5;netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>net452;netstandard2.0;netstandard1.5;</TargetFrameworks>
+	<GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageId>MongoDbGenericRepository</PackageId>
-    <PackageVersion>1.2.0</PackageVersion>
+    <PackageVersion>1.4.6</PackageVersion>
     <Authors>Alexandre Spieser</Authors>
+    <PackageTitle>MongoDb Generic Repository</PackageTitle>
     <Description>A generic repository implementation using the MongoDB C# Sharp 2.0 driver.</Description>
+    <PackageLicenseUrl>http://www.opensource.org/licenses/mit-license.php</PackageLicenseUrl>
+    <PackageProjectUrl>http://www.opensource.org/licenses/mit-license.php</PackageProjectUrl>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
-    <PackageReleaseNotes>.NET Core supported.</PackageReleaseNotes>
-    <Copyright>Copyright 2017 (c) Alexandre Spieser. All rights reserved.</Copyright>
-    <PackageTags>MongoDb Repository NoSql Generic</PackageTags>
+    <PackageReleaseNotes>Release notes are at https://github.com/alexandre-spieser/mongodb-generic-repository/releases </PackageReleaseNotes>
+    <Copyright>Copyright 2020 (c) Alexandre Spieser. All rights reserved.</Copyright>
+    <PackageTags>MongoDb Repository Generic NoSql</PackageTags>
+    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    <Version>1.4.6</Version>
+    <RepositoryUrl>https://github.com/alexandre-spieser/mongodb-generic-repository</RepositoryUrl>
+    <RepositoryType>Git</RepositoryType>
   </PropertyGroup>
 
-  <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Release|net45|AnyCPU'">
-    <DocumentationFile>bin\Release\net45\MongoDbGenericRepository.xml</DocumentationFile>
+	<PropertyGroup>
+		<DocumentationFile>bin\$(Configuration)\$(TargetFramework)\$(AssemblyName).xml</DocumentationFile>
 	</PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MongoDB.Driver" Version="2.5.0" />
+    <PackageReference Include="MongoDB.Driver" Version="2.12.0" />
   </ItemGroup>
 
 </Project>

MongoDbGenericRepository/MongoDbGenericRepository.nuspec

@@ -2,7 +2,7 @@
 <package >
   <metadata>
     <id>MongoDbGenericRepository</id>
-    <version>1.3.5</version>
+    <version>1.4.5</version>
     <title>MongoDb Generic Repository</title>
     <authors>Alexandre Spieser</authors>
     <owners>Alexandre Spieser</owners>
@@ -10,11 +10,19 @@
     <projectUrl>https://github.com/alexandre-spieser/mongodb-generic-repository</projectUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <description>A generic repository implementation using the MongoDB C# Sharp 2.0 driver.</description>
-    <releaseNotes>Adding CollectionName attribute to specify alternate collection name (thanks Etchelon).</releaseNotes>
-    <copyright>Copyright 2017 (c) Alexandre Spieser. All rights reserved.</copyright>
+    <releaseNotes>Release notes are at https://github.com/alexandre-spieser/mongodb-generic-repository/releases</releaseNotes>
+    <copyright>Copyright 2020 (c) Alexandre Spieser. All rights reserved.</copyright>
     <tags>MongoDb Repository Generic NoSql</tags>
 	<dependencies>
-		<dependency id="MongoDB.Driver" version="2.5.0" />
+		<group targetFramework=".NETFramework4.5.2">
+		  <dependency id="MongoDB.Driver" version="2.9.3" exclude="Build,Analyzers" />
+		</group>
+		<group targetFramework=".NETStandard1.5">
+		  <dependency id="MongoDB.Driver" version="2.9.3" exclude="Build,Analyzers"  />
+		</group>
+		<group targetFramework=".NETStandard2.0">
+		  <dependency id="MongoDB.Driver" version="2.9.3" exclude="Build,Analyzers"/>
+		</group>
 	</dependencies>
   </metadata>
   <files>

MongoDbGenericRepository/ReadOnlyMongoRepository.cs

@@ -1,190 +1,46 @@
 using MongoDB.Driver;
+using MongoDbGenericRepository.DataAccess.Read;
+using MongoDbGenericRepository.Models;
 using System;
 using System.Collections.Generic;
-using System.Threading.Tasks;
-using System.Linq.Expressions;
-using MongoDbGenericRepository.Models;
 using System.Linq;
+using System.Linq.Expressions;
+using System.Threading;
+using System.Threading.Tasks;
 
 namespace MongoDbGenericRepository
 {
     /// <summary>
-    /// The ReadOnlyMongoRepository implements the readonly functionality of the IReadOnlyMongoRepository.
+    /// The base Repository, it is meant to be inherited from by your custom custom MongoRepository implementation.
+    /// Its constructor must be given a connection string and a database name.
     /// </summary>
-    public class ReadOnlyMongoRepository : IReadOnlyMongoRepository
+    public abstract class ReadOnlyMongoRepository : ReadOnlyMongoRepository<Guid>, IReadOnlyMongoRepository
     {
-        /// <summary>
-        /// The connection string.
-        /// </summary>
-        public string ConnectionString { get; set; }
-
-        /// <summary>
-        /// The database name.
-        /// </summary>
-        public string DatabaseName { get; set; }
-
-        /// <summary>
-        /// The MongoDbContext
-        /// </summary>
-        protected IMongoDbContext MongoDbContext = null;
-
         /// <summary>
         /// The constructor taking a connection string and a database name.
         /// </summary>
         /// <param name="connectionString">The connection string of the MongoDb server.</param>
         /// <param name="databaseName">The name of the database against which you want to perform operations.</param>
-        protected ReadOnlyMongoRepository(string connectionString, string databaseName)
+        protected ReadOnlyMongoRepository(string connectionString, string databaseName = null) : base(connectionString, databaseName)
         {
-            MongoDbContext = new MongoDbContext(connectionString, databaseName);
         }
 
         /// <summary>
         /// The contructor taking a <see cref="IMongoDbContext"/>.
         /// </summary>
         /// <param name="mongoDbContext">A mongodb context implementing <see cref="IMongoDbContext"/></param>
-        protected ReadOnlyMongoRepository(IMongoDbContext mongoDbContext)
+        protected ReadOnlyMongoRepository(IMongoDbContext mongoDbContext) : base(mongoDbContext)
         {
-            MongoDbContext = mongoDbContext;
         }
 
         /// <summary>
         /// The contructor taking a <see cref="IMongoDatabase"/>.
         /// </summary>
         /// <param name="mongoDatabase">A mongodb context implementing <see cref="IMongoDatabase"/></param>
-        protected ReadOnlyMongoRepository(IMongoDatabase mongoDatabase)
+        protected ReadOnlyMongoRepository(IMongoDatabase mongoDatabase) : base(mongoDatabase)
         {
-            MongoDbContext = new MongoDbContext(mongoDatabase);
         }
 
-        #region Read
-
-        /// <summary>
-        /// Asynchronously returns one document given its id.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="id">The Id of the document you want to get.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        public async Task<TDocument> GetByIdAsync<TDocument>(Guid id, string partitionKey = null) where TDocument : IDocument
-        {
-            var filter = Builders<TDocument>.Filter.Eq("Id", id);
-            return await HandlePartitioned<TDocument>(partitionKey).Find(filter).FirstOrDefaultAsync();
-        }
-
-        /// <summary>
-        /// Returns one document given its id.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="id">The Id of the document you want to get.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        public TDocument GetById<TDocument>(Guid id, string partitionKey = null) where TDocument : IDocument
-        {
-            var filter = Builders<TDocument>.Filter.Eq("Id", id);
-            return HandlePartitioned<TDocument>(partitionKey).Find(filter).FirstOrDefault();
-        }
-
-        /// <summary>
-        /// Asynchronously returns one document given an expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        public async Task<TDocument> GetOneAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument
-        {
-            return await HandlePartitioned<TDocument>(partitionKey).Find(filter).FirstOrDefaultAsync();
-        }
-
-        /// <summary>
-        /// Returns one document given an expression filter.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        public TDocument GetOne<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument
-        {
-            return HandlePartitioned<TDocument>(partitionKey).Find(filter).FirstOrDefault();
-        }
-
-        /// <summary>
-        /// Returns a collection cursor.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        public IFindFluent<TDocument, TDocument> GetCursor<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument
-        {
-            return HandlePartitioned<TDocument>(partitionKey).Find(filter);
-        }
-
-        /// <summary>
-        /// Returns true if any of the document of the collection matches the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        public async Task<bool> AnyAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument
-        {
-            var count = await HandlePartitioned<TDocument>(partitionKey).CountAsync(filter);
-            return (count > 0);
-        }
-
-        /// <summary>
-        /// Returns true if any of the document of the collection matches the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        public bool Any<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument
-        {
-            var count = HandlePartitioned<TDocument>(partitionKey).Count(filter);
-            return (count > 0);
-        }
-
-        /// <summary>
-        /// Asynchronously returns a list of the documents matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        public async Task<List<TDocument>> GetAllAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument
-        {
-            return await HandlePartitioned<TDocument>(partitionKey).Find(filter).ToListAsync();
-        }
-
-        /// <summary>
-        /// Returns a list of the documents matching the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partition key.</param>
-        public List<TDocument> GetAll<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument
-        {
-            return HandlePartitioned<TDocument>(partitionKey).Find(filter).ToList();
-        }
-
-        /// <summary>
-        /// Asynchronously counts how many documents match the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partitionKey</param>
-        public async Task<long> CountAsync<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument
-        {
-            return await HandlePartitioned<TDocument>(partitionKey).CountAsync(filter);
-        }
-
-        /// <summary>
-        /// Counts how many documents match the filter condition.
-        /// </summary>
-        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <param name="filter">A LINQ expression filter.</param>
-        /// <param name="partitionKey">An optional partitionKey</param>
-        public long Count<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument
-        {
-            return HandlePartitioned<TDocument>(partitionKey).Find(filter).Count();
-        }
-
-        #endregion
-
         #region Read TKey
 
         /// <summary>
@@ -194,12 +50,12 @@ namespace MongoDbGenericRepository
         /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="id">The Id of the document you want to get.</param>
         /// <param name="partitionKey">An optional partition key.</param>
-        public async Task<TDocument> GetByIdAsync<TDocument, TKey>(TKey id, string partitionKey = null)
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<TDocument> GetByIdAsync<TDocument, TKey>(TKey id, string partitionKey = null, CancellationToken cancellationToken = default)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
-            var filter = Builders<TDocument>.Filter.Eq("Id", id);
-            return await HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).FirstOrDefaultAsync();
+            return await MongoDbReader.GetByIdAsync<TDocument, TKey>(id, partitionKey, cancellationToken);
         }
 
         /// <summary>
@@ -209,12 +65,11 @@ namespace MongoDbGenericRepository
         /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="id">The Id of the document you want to get.</param>
         /// <param name="partitionKey">An optional partition key.</param>
-        public TDocument GetById<TDocument, TKey>(TKey id, string partitionKey = null)
+        public virtual TDocument GetById<TDocument, TKey>(TKey id, string partitionKey = null)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
-            var filter = Builders<TDocument>.Filter.Eq("Id", id);
-            return HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).FirstOrDefault();
+            return MongoDbReader.GetById<TDocument, TKey>(id, partitionKey);
         }
 
         /// <summary>
@@ -224,11 +79,12 @@ namespace MongoDbGenericRepository
         /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="filter">A LINQ expression filter.</param>
         /// <param name="partitionKey">An optional partition key.</param>
-        public async Task<TDocument> GetOneAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<TDocument> GetOneAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null, CancellationToken cancellationToken = default)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
-            return await HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).FirstOrDefaultAsync();
+            return await MongoDbReader.GetOneAsync<TDocument, TKey>(filter, partitionKey, cancellationToken);
         }
 
         /// <summary>
@@ -238,11 +94,11 @@ namespace MongoDbGenericRepository
         /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="filter">A LINQ expression filter.</param>
         /// <param name="partitionKey">An optional partition key.</param>
-        public TDocument GetOne<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+        public virtual TDocument GetOne<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
-            return HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).FirstOrDefault();
+            return MongoDbReader.GetOne<TDocument, TKey>(filter, partitionKey);
         }
 
         /// <summary>
@@ -252,11 +108,11 @@ namespace MongoDbGenericRepository
         /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="filter">A LINQ expression filter.</param>
         /// <param name="partitionKey">An optional partition key.</param>
-        public IFindFluent<TDocument, TDocument> GetCursor<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+        public virtual IFindFluent<TDocument, TDocument> GetCursor<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
-            return HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter);
+            return MongoDbReader.GetCursor<TDocument, TKey>(filter, partitionKey);
         }
 
         /// <summary>
@@ -266,12 +122,12 @@ namespace MongoDbGenericRepository
         /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="filter">A LINQ expression filter.</param>
         /// <param name="partitionKey">An optional partition key.</param>
-        public async Task<bool> AnyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<bool> AnyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null, CancellationToken cancellationToken = default)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
-            var count = await HandlePartitioned<TDocument, TKey>(partitionKey).CountAsync(filter);
-            return (count > 0);
+            return await MongoDbReader.AnyAsync<TDocument, TKey>(filter, partitionKey, cancellationToken);
         }
 
         /// <summary>
@@ -281,12 +137,11 @@ namespace MongoDbGenericRepository
         /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="filter">A LINQ expression filter.</param>
         /// <param name="partitionKey">An optional partition key.</param>
-        public bool Any<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+        public virtual bool Any<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
-            var count = HandlePartitioned<TDocument, TKey>(partitionKey).Count(filter);
-            return (count > 0);
+            return MongoDbReader.Any<TDocument, TKey>(filter, partitionKey);
         }
 
         /// <summary>
@@ -296,11 +151,12 @@ namespace MongoDbGenericRepository
         /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="filter">A LINQ expression filter.</param>
         /// <param name="partitionKey">An optional partition key.</param>
-        public async Task<List<TDocument>> GetAllAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<List<TDocument>> GetAllAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null, CancellationToken cancellationToken = default)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
-            return await HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).ToListAsync();
+            return await MongoDbReader.GetAllAsync<TDocument, TKey>(filter, partitionKey, cancellationToken);
         }
 
         /// <summary>
@@ -310,11 +166,11 @@ namespace MongoDbGenericRepository
         /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="filter">A LINQ expression filter.</param>
         /// <param name="partitionKey">An optional partition key.</param>
-        public List<TDocument> GetAll<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+        public virtual List<TDocument> GetAll<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
-            return HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).ToList();
+            return MongoDbReader.GetAll<TDocument, TKey>(filter, partitionKey);
         }
 
         /// <summary>
@@ -324,11 +180,12 @@ namespace MongoDbGenericRepository
         /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="filter">A LINQ expression filter.</param>
         /// <param name="partitionKey">An optional partitionKey</param>
-        public async Task<long> CountAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<long> CountAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null, CancellationToken cancellationToken = default)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
-            return await HandlePartitioned<TDocument, TKey>(partitionKey).CountAsync(filter);
+            return await MongoDbReader.CountAsync<TDocument, TKey>(filter, partitionKey, cancellationToken);
         }
 
         /// <summary>
@@ -338,53 +195,431 @@ namespace MongoDbGenericRepository
         /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="filter">A LINQ expression filter.</param>
         /// <param name="partitionKey">An optional partitionKey</param>
-        public long Count<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
+        public virtual long Count<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
-            return HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).Count();
+            return MongoDbReader.Count<TDocument, TKey>(filter, partitionKey);
+        }
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by descending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<TDocument> GetByMaxAsync<TDocument, TKey>(
+            Expression<Func<TDocument, bool>> filter, 
+            Expression<Func<TDocument, object>> maxValueSelector, 
+            string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbReader.GetByMaxAsync<TDocument, TKey>(filter, maxValueSelector, partitionKey, cancellationToken);
+        }
+
+        /// <summary>
+        /// Gets the document with the maximum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by descending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        public virtual TDocument GetByMax<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> maxValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbReader.GetByMax<TDocument, TKey>(filter, maxValueSelector, partitionKey);
+        }
+
+        /// <summary>
+        /// Gets the document with the minimum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector for the minimum value you are looking for.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<TDocument> GetByMinAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, 
+            Expression<Func<TDocument, object>> minValueSelector, 
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbReader.GetByMinAsync<TDocument, TKey>(filter, minValueSelector, partitionKey, cancellationToken);
+        }
+
+        /// <summary>
+        /// Gets the document with the minimum value of a specified property in a MongoDB collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector for the minimum value you are looking for.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        public virtual TDocument GetByMin<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> minValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbReader.GetByMin<TDocument, TKey>(filter, minValueSelector, partitionKey);
+        }
+
+        /// <summary>
+        /// Gets the maximum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector for the maximum value you are looking for.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public async virtual Task<TValue> GetMaxValueAsync<TDocument, TKey, TValue>(
+            Expression<Func<TDocument, bool>> filter, 
+            Expression<Func<TDocument, TValue>> maxValueSelector, 
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbReader.GetMaxValueAsync<TDocument, TKey, TValue>(filter, maxValueSelector, partitionKey, cancellationToken);
+        }
+
+        /// <summary>
+        /// Gets the maximum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="maxValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partitionKey.</param>
+        public virtual TValue GetMaxValue<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> maxValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbReader.GetMaxValue<TDocument, TKey, TValue>(filter, maxValueSelector, partitionKey);
+        }
+
+        /// <summary>
+        /// Gets the minimum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public virtual async Task<TValue> GetMinValueAsync<TDocument, TKey, TValue>(
+            Expression<Func<TDocument, bool>> filter, 
+            Expression<Func<TDocument, TValue>> minValueSelector, 
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await MongoDbReader.GetMinValueAsync<TDocument, TKey, TValue>(filter, minValueSelector, partitionKey, cancellationToken);
+        }
+
+        /// <summary>
+        /// Gets the minimum value of a property in a mongodb collections that is satisfying the filter.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TValue">The type of the value used to order the query.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="minValueSelector">A property selector to order by ascending.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual TValue GetMinValue<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> minValueSelector, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbReader.GetMinValue<TDocument, TKey, TValue>(filter, minValueSelector, partitionKey);
         }
 
         #endregion
 
-        #region Utility Methods
+        #region Sum TKey
 
         /// <summary>
-        /// Gets a collections for the type TDocument with the matching partition key.
+        /// Sums the values of a selected field for a given filtered collection of documents.
         /// </summary>
-        /// <typeparam name="TDocument">The document type.</typeparam>
-        /// <param name="partitionKey">The partion key.</param>
-        /// <returns>An <see cref="IMongoCollection{TDocument}"/></returns>
-        protected IMongoCollection<TDocument> GetCollection<TDocument>(string partitionKey) where TDocument : IDocument
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public virtual async Task<int> SumByAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, int>> selector,
+                                                       string partitionKey = null,
+                                                       CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
         {
-            return MongoDbContext.GetCollection<TDocument>(partitionKey);
+            return await MongoDbReader.SumByAsync<TDocument, TKey>(filter, selector, partitionKey, cancellationToken);
         }
 
         /// <summary>
-        /// Gets a collections for the type TDocument
+        /// Sums the values of a selected field for a given filtered collection of documents.
         /// </summary>
-        /// <typeparam name="TDocument">The document type.</typeparam>
-        /// <returns></returns>
-        protected IMongoCollection<TDocument> GetCollection<TDocument>() where TDocument : IDocument
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual int SumBy<TDocument, TKey>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, int>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
         {
-            return MongoDbContext.GetCollection<TDocument>();
+            return MongoDbReader.SumBy<TDocument, TKey>(filter, selector, partitionKey);
         }
 
         /// <summary>
-        /// Gets a collections for the type TDocument
+        /// Sums the values of a selected field for a given filtered collection of documents.
         /// </summary>
-        /// <typeparam name="TDocument">The document type.</typeparam>
-        /// <param name="document">The document.</param>
-        /// <returns></returns>
-        protected IMongoCollection<TDocument> HandlePartitioned<TDocument>(TDocument document) where TDocument : IDocument
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual async Task<decimal> SumByAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, decimal>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
         {
-            if (document is IPartitionedDocument)
+            return await MongoDbReader.SumByAsync<TDocument, TKey>(filter, selector, partitionKey);
+        }
+
+        /// <summary>
+        /// Sums the values of a selected field for a given filtered collection of documents.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="selector">The field you want to sum.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual decimal SumBy<TDocument, TKey>(Expression<Func<TDocument, bool>> filter,
+                                                       Expression<Func<TDocument, decimal>> selector,
+                                                       string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
         {
-                return GetCollection<TDocument>(((IPartitionedDocument)document).PartitionKey);
+            return MongoDbReader.SumBy<TDocument, TKey>(filter, selector, partitionKey);
         }
-            return GetCollection<TDocument>();
+
+        #endregion Sum TKey
+
+        #region Project TKey
+
+        /// <summary>
+        /// Asynchronously returns a projected document matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public virtual async Task<TProjection> ProjectOneAsync<TDocument, TProjection, TKey>(
+            Expression<Func<TDocument, bool>> filter, 
+            Expression<Func<TDocument, TProjection>> projection, 
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class
+        {
+            return await MongoDbReader.ProjectOneAsync<TDocument, TProjection, TKey>(filter, projection, partitionKey, cancellationToken);
         }
 
+        /// <summary>
+        /// Returns a projected document matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual TProjection ProjectOne<TDocument, TProjection, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class
+        {
+            return MongoDbReader.ProjectOne<TDocument, TProjection, TKey>(filter, projection, partitionKey);
+        }
+
+        /// <summary>
+        /// Asynchronously returns a list of projected documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public virtual async Task<List<TProjection>> ProjectManyAsync<TDocument, TProjection, TKey>(
+            Expression<Func<TDocument, bool>> filter, 
+            Expression<Func<TDocument, TProjection>> projection, 
+            string partitionKey = null, CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class
+        {
+            return await MongoDbReader.ProjectManyAsync<TDocument, TProjection, TKey>(filter, projection, partitionKey, cancellationToken);
+        }
+
+        /// <summary>
+        /// Asynchronously returns a list of projected documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
+        /// <param name="filter">The document filter.</param>
+        /// <param name="projection">The projection expression.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual List<TProjection> ProjectMany<TDocument, TProjection, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class
+        {
+            return MongoDbReader.ProjectMany<TDocument, TProjection, TKey>(filter, projection, partitionKey);
+        }
+
+        #endregion Project TKey
+
+        #region Group By TKey
+
+        /// <summary>
+        /// Groups filtered a collection of documents given a grouping criteria, 
+        /// and returns a dictionary of listed document groups with keys having the different values of the grouping criteria.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TGroupKey">The type of the grouping criteria.</typeparam>
+        /// <typeparam name="TProjection">The type of the projected group.</typeparam>
+        /// <param name="groupingCriteria">The grouping criteria.</param>
+        /// <param name="groupProjection">The projected group result.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual List<TProjection> GroupBy<TDocument, TGroupKey, TProjection, TKey>(
+            Expression<Func<TDocument, TGroupKey>> groupingCriteria,
+            Expression<Func<IGrouping<TGroupKey, TDocument>, TProjection>> groupProjection,
+            string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+            where TProjection : class, new()
+        {
+            return MongoDbReader.GroupBy<TDocument, TGroupKey, TProjection, TKey>(groupingCriteria, groupProjection, partitionKey);
+        }
+
+        /// <summary>
+        /// Groups filtered a collection of documents given a grouping criteria, 
+        /// and returns a dictionary of listed document groups with keys having the different values of the grouping criteria.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <typeparam name="TGroupKey">The type of the grouping criteria.</typeparam>
+        /// <typeparam name="TProjection">The type of the projected group.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="groupingCriteria">The grouping criteria.</param>
+        /// <param name="groupProjection">The projected group result.</param>
+        /// <param name="partitionKey">The partition key of your document, if any.</param>
+        public virtual List<TProjection> GroupBy<TDocument, TGroupKey, TProjection, TKey>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, TGroupKey>> groupingCriteria,
+            Expression<Func<IGrouping<TGroupKey, TDocument>, TProjection>> groupProjection,
+            string partitionKey = null)
+                where TDocument : IDocument<TKey>
+                where TKey : IEquatable<TKey>
+                where TProjection : class, new()
+        {
+            return MongoDbReader.GroupBy<TDocument, TGroupKey, TProjection, TKey>(filter, groupingCriteria, groupProjection, partitionKey);
+        }
+
+        #endregion Group By TKey
+
+
+        #region Pagination
+
+        /// <summary>
+        /// Asynchronously returns a paginated list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="sortSelector">The property selector.</param>
+        /// <param name="ascending">Order of the sorting.</param>
+        /// <param name="skipNumber">The number of documents you want to skip. Default value is 0.</param>
+        /// <param name="takeNumber">The number of documents you want to take. Default value is 50.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        public virtual async Task<List<TDocument>> GetSortedPaginatedAsync<TDocument, TKey>(
+            Expression<Func<TDocument, bool>> filter,
+            Expression<Func<TDocument, object>> sortSelector,
+            bool ascending = true,
+            int skipNumber = 0,
+            int takeNumber = 50,
+            string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            var sorting = ascending
+                ? Builders<TDocument>.Sort.Ascending(sortSelector)
+                : Builders<TDocument>.Sort.Descending(sortSelector);
+
+            return await HandlePartitioned<TDocument, TKey>(partitionKey)
+                                    .Find(filter)
+                                    .Sort(sorting)
+                                    .Skip(skipNumber)
+                                    .Limit(takeNumber)
+                                    .ToListAsync();
+        }
+
+        /// <summary>
+        /// Asynchronously returns a paginated list of the documents matching the filter condition.
+        /// </summary>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
+        /// <param name="filter">A LINQ expression filter.</param>
+        /// <param name="sortDefinition">The sort definition.</param>
+        /// <param name="skipNumber">The number of documents you want to skip. Default value is 0.</param>
+        /// <param name="takeNumber">The number of documents you want to take. Default value is 50.</param>
+        /// <param name="partitionKey">An optional partition key.</param>
+        /// <param name="cancellationToken">An optional cancellation Token.</param>
+        public virtual async Task<List<TDocument>> GetSortedPaginatedAsync<TDocument, TKey>(
+            Expression<Func<TDocument, bool>> filter,
+            SortDefinition<TDocument> sortDefinition,
+            int skipNumber = 0,
+            int takeNumber = 50,
+            string partitionKey = null,
+            CancellationToken cancellationToken = default)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return await HandlePartitioned<TDocument, TKey>(partitionKey)
+                                    .Find(filter)
+                                    .Sort(sortDefinition)
+                                    .Skip(skipNumber)
+                                    .Limit(takeNumber)
+                                    .ToListAsync(cancellationToken);
+        }
+
+        #endregion Pagination
+
+
+
         /// <summary>
         /// Gets a collections for a potentially partitioned document type.
         /// </summary>
@@ -392,44 +627,11 @@ namespace MongoDbGenericRepository
         /// <typeparam name="TKey">The type of the primary key.</typeparam>
         /// <param name="document">The document.</param>
         /// <returns></returns>
-        protected IMongoCollection<TDocument> HandlePartitioned<TDocument, TKey>(TDocument document)
+        public virtual IMongoCollection<TDocument> HandlePartitioned<TDocument, TKey>(TDocument document)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
-            if (document is IPartitionedDocument)
-            {
-                return GetCollection<TDocument, TKey>(((IPartitionedDocument)document).PartitionKey);
-            }
-            return GetCollection<TDocument, TKey>();
-        }
-
-        /// <summary>
-        /// Gets a collections for a potentially partitioned document type.
-        /// </summary>
-        /// <typeparam name="TDocument">The document type.</typeparam>
-        /// <param name="partitionKey">The collection partition key.</param>
-        /// <returns></returns>
-        protected IMongoCollection<TDocument> HandlePartitioned<TDocument>(string partitionKey) where TDocument : IDocument
-        {
-            if (!string.IsNullOrEmpty(partitionKey))
-            {
-                return GetCollection<TDocument>(partitionKey);
-            }
-            return GetCollection<TDocument>();
-        }
-
-        /// <summary>
-        /// Gets a collections for the type TDocument with a partition key.
-        /// </summary>
-        /// <typeparam name="TDocument">The document type.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key.</typeparam>
-        /// <param name="partitionKey">The collection partition key.</param>
-        /// <returns></returns>
-        protected IMongoCollection<TDocument> GetCollection<TDocument, TKey>(string partitionKey = null)
-            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>
-        {
-            return MongoDbContext.GetCollection<TDocument, TKey>(partitionKey);
+            return MongoDbReader.HandlePartitioned<TDocument, TKey>(document);
         }
 
         /// <summary>
@@ -439,7 +641,7 @@ namespace MongoDbGenericRepository
         /// <typeparam name="TKey">The type of the primary key.</typeparam>
         /// <param name="partitionKey">The collection partition key.</param>
         /// <returns></returns>
-        protected IMongoCollection<TDocument> HandlePartitioned<TDocument, TKey>(string partitionKey)
+        public virtual IMongoCollection<TDocument> HandlePartitioned<TDocument, TKey>(string partitionKey)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
@@ -450,7 +652,30 @@ namespace MongoDbGenericRepository
             return GetCollection<TDocument, TKey>();
         }
 
-        #endregion
+        /// <summary>
+        /// Gets a collections for a potentially partitioned document type.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <param name="document">The document.</param>
+        /// <returns></returns>
+        public virtual IMongoCollection<TDocument> HandlePartitioned<TDocument>(TDocument document)
+            where TDocument : IDocument<Guid>
+        {
+            return MongoDbReader.HandlePartitioned<TDocument, Guid>(document);
+        }
 
+        /// <summary>
+        /// Gets a collections for the type TDocument with a partition key.
+        /// </summary>
+        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <param name="partitionKey">The collection partition key.</param>
+        /// <returns></returns>
+        public virtual IMongoCollection<TDocument> GetCollection<TDocument, TKey>(string partitionKey = null)
+            where TDocument : IDocument<TKey>
+            where TKey : IEquatable<TKey>
+        {
+            return MongoDbReader.GetCollection<TDocument, TKey>(partitionKey);
+        }
     }
 }

MongoDbGenericRepository/Utils/IdGenerator.cs

@@ -0,0 +1,39 @@
+using MongoDB.Bson;
+using System;
+
+namespace MongoDbGenericRepository.Utils
+{
+    /// <summary>
+    /// The IdGenerator instance, used to generate Ids of different types.
+    /// </summary>
+    public static class IdGenerator
+    {
+        private static readonly Random Random = new Random();
+
+        /// <summary>
+        /// Generates a random value of a given type.
+        /// </summary>
+        /// <typeparam name="TKey">The type of the value to generate.</typeparam>
+        /// <returns>A value of type TKey.</returns>
+        public static TKey GetId<TKey>()
+        {
+            var idTypeName = typeof(TKey).Name;
+            switch (idTypeName)
+            {
+                case "Guid":
+                    return (TKey)(object)Guid.NewGuid();
+                case "Int16":
+                    return (TKey)(object)Random.Next(1, short.MaxValue);
+                case "Int32":
+                    return (TKey)(object)Random.Next(1, int.MaxValue);
+                case "Int64":
+                    return (TKey)(object)(Random.NextLong(1, long.MaxValue));
+                case "String":
+                    return (TKey)(object)Guid.NewGuid().ToString();
+                case "ObjectId":
+                    return (TKey)(object)ObjectId.GenerateNewId();
+            }
+            throw new ArgumentException($"{idTypeName} is not a supported Id type, the Id of the document cannot be set.");
+        }
+    }
+}

README.md

@@ -1,13 +1,26 @@
 # MongoDbGenericRepository
+
 An example of generic repository implementation using the MongoDB C# Sharp 2.0 driver (async)
 
 Now available as a nuget package:
 https://www.nuget.org/packages/MongoDbGenericRepository/
 
-Covered by 200+ integration tests and counting.
+Covered by 400+ integration tests and counting.
 
 The MongoDbGenericRepository is also used in [AspNetCore.Identity.MongoDbCore](https://github.com/alexandre-spieser/AspNetCore.Identity.MongoDbCore).
 
+# Support This Project
+
+If you have found this project helpful, either as a library that you use or as a learning tool, please consider buying Alex a coffee: <a href="https://www.buymeacoffee.com/zeitquest" target="_blank"><img height="40px" src="https://cdn.buymeacoffee.com/buttons/default-orange.png" alt="Buy Me A Coffee" style="max-height: 51px;width: 150px !important;" ></a>
+
+# Worth Knowing
+
+This package sets the `MongoDefaults.GuidRepresentation` to `MongoDB.Bson.GuidRepresentation.Standard` by default, instead of the default driver setting of `MongoDB.Bson.GuidRepresentation.CSharpLegacy`. This can cause issues if you have been using the driver on an existing application previously or if you are using CosmosDB.
+
+You can override this behaviour to enforce legacy behaviour in your app Startup routine like so :
+
+`MongoDbContext.SetGuidRepresentation(MongoDB.Bson.GuidRepresentation.CSharpLegacy)`. More info [here](https://github.com/alexandre-spieser/mongodb-generic-repository/issues/7).
+
 # Usage examples
 
 This repository is meant to be inherited from. 
@@ -40,12 +53,26 @@ Here is an example of repository usage, where the TestRepository is implementing
         }
     }
 ```
+If all your documents have the same type of `Id`, you can use the more specific `BaseMongoRepository<TKey>` where `TKey` is the type of the `Id` of your documents.
+```csharp
+    public class TestTKeyRepository<TKey> : BaseMongoRepository<TKey>, ITestRepository<TKey> where TKey : IEquatable<TKey>
+    {
+        const string connectionString = "mongodb://localhost:27017/MongoDbTests";
+        private static readonly ITestRepository<TKey> _instance = new TestTKeyRepository<TKey>(connectionString);
+        /// <inheritdoc />
+        private TestTKeyRepository(string connectionString) : base(connectionString)
+        {
+        }
+    }
+```
+
 ## Instantiation
 
 The repository can be instantiated like so:
 
 ```csharp
 ITestRepository testRepository = new TestRepository(connectionString, "MongoDbTests");
+ITestRepository<TKey> testTKeyRepository = new TestTKeyRepository<TKey>(connectionString);
 ```
 
 If you prefer to reuse the same MongoDb database across your application, you can use the `MongoDatabase` from the MongoDb driver implementing the `IMongoDatabase` interface:
@@ -127,7 +154,56 @@ _testRepository.AddOne(myDoc);
 
 The above code will generate a collection named `myPartitionKey-myPartitionedDocuments`.
 
+## CollectionName Attribute
+It is now possible to change the collection name by using the `CollectionName` attribute:
+
+```csharp
+    [CollectionName("MyCollectionName")]
+    public class MyDocument : Document
+    {
+        public MyDocument()
+        {
+            Version = 2;
+        }
+        public string SomeContent { get; set; }
+    }
+```
+Documents of this type will be inserted into a collection named "MyCollectionName".
+
+## Index Management
+From version 1.3.8 the `MongoDbGenericRepository` implements the `IBaseMongoRepository_Index` and  `IBaseMongoRepository_Index<TKey>` interfaces. 
+This exposes the functionality to programmatically manage indexes against your collections in a generic fashion.
+
+The following methods are exposed and fully integration tested:
++ CreateAscendingIndexAsync
++ CreateDescendingIndexAsync
++ CreateCombinedTextIndexAsync
++ CreateHashedIndexAsync
++ CreateTextIndexAsync
++ DropIndexAsync
++ GetIndexesNamesAsync
+
+Usage examples:  
+```csharp
+	string expectedIndexName = $"myCustomIndexName";
+	var option = new IndexCreationOptions
+	{
+		Name = expectedIndexName
+	};
+	// Act
+	// create a text index against the Version property of the document.
+	var result = await SUT.CreateTextIndexAsync<T, TKey>(x => x.Version, option, PartitionKey);
+
+	// Assert
+	var listOfIndexNames = await SUT.GetIndexesNamesAsync<T, TKey>(PartitionKey);
+	Assert.Contains(expectedIndexName, listOfIndexNames);
+
+	// Cleanup
+	await SUT.DropIndexAsync<T, TKey>(expectedIndexName, PartitionKey);
+```
+
 Please refer to the IntegrationTests (NET45) and CoreIntegrationTests (netstandard2.0) projects for more usage examples.
+The `CoreIntegrationTests.Infrastructure.MongoDbTKeyDocumentTestBase<T, TKey>` test class is a good start.
 
 ## Author
 **Alexandre Spieser**
@@ -137,7 +213,7 @@ mongodb-generic-repository is under MIT license - http://www.opensource.org/lice
 
 The MIT License (MIT)
 
-Copyright (c) 2016-2017 Alexandre Spieser
+Copyright (c) 2016-2019 Alexandre Spieser
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -172,4 +248,4 @@ Copyright (c) 2012-2014 Mehdi Khalili (http://omar.io)
 ==============================================================================
 
 ## Copyright
-Copyright © 2017
+Copyright © 2019