diff --git a/IntegrationTests/GroupTests/GroupingTests.cs b/IntegrationTests/GroupTests/GroupingTests.cs
new file mode 100644
index 0000000..751af45
--- /dev/null
+++ b/IntegrationTests/GroupTests/GroupingTests.cs
@@ -0,0 +1,108 @@
+using IntegrationTests.Infrastructure;
+using MongoDbGenericRepository.Models;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace IntegrationTests.GroupTests
+{
+    public class GroupingTestsDocument : Document
+    {
+        public GroupingTestsDocument()
+        {
+            Version = 2;
+            Children = new List<Child>();
+        }
+        public string SomeContent { get; set; }
+        public int GroupingKey { get; set; }
+        public List<Child> Children { get; set; }
+    }
+
+    public class ProjectedGroup
+    {
+        public int Key { get; set; }
+        public List<string> Content { get; set; } 
+    }
+
+    public class GroupingTests : BaseMongoDbRepositoryTests<GroupingTestsDocument>
+    {
+        [Test]
+        public void GroupByTProjection()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(5);
+            for(var i = 0; i < documents.Count - 2; i++)
+            {
+                documents[i].GroupingKey = 1;
+                documents[i].SomeContent = $"content-{i}";
+            }
+            for (var i = 3; i < documents.Count; i++)
+            {
+                documents[i].GroupingKey = 2;
+                documents[i].SomeContent = $"content-{i}";
+            }
+            SUT.AddMany(documents);
+
+            // Act
+
+            var result = SUT.GroupBy<GroupingTestsDocument, int, ProjectedGroup>(
+                            e => e.GroupingKey, g => new ProjectedGroup {
+                                Key = g.Key,
+                                Content = g.Select(doc => doc.SomeContent).ToList()
+                            });
+
+            // Assert
+            var key1Group = result.First(e => e.Key == 1);
+            Assert.NotNull(key1Group);
+            Assert.AreEqual(3, key1Group.Content.Count);
+            var key2Group = result.First(e => e.Key == 2);
+            Assert.NotNull(key2Group);
+            Assert.AreEqual(2, key2Group.Content.Count);
+        }
+
+        [Test]
+        public void FilteredGroupByTProjection()
+        {
+            // Arrange
+            var documents = CreateTestDocuments(5);
+            for (var i = 0; i < documents.Count - 2; i++)
+            {
+                documents[i].GroupingKey = 4;
+                documents[i].SomeContent = $"content-{i}";
+            }
+            for (var i = 3; i < documents.Count; i++)
+            {
+                documents[i].GroupingKey = 5;
+                documents[i].SomeContent = $"content-{i}";
+            }
+            var guid1 = Guid.NewGuid().ToString("n");
+            var guid2 = Guid.NewGuid().ToString("n");
+            for (var i = 0; i < documents.Count - 1; i++)
+            {
+                documents[i].Children = new List<Child> {
+                    new Child(guid1, guid2)
+                };
+            }
+
+            SUT.AddMany(documents);
+
+            // Act
+            var result = SUT.GroupBy<GroupingTestsDocument, int, ProjectedGroup>(
+                            e => e.Children.Any(c => c.Type == guid1),
+                            e => e.GroupingKey, g => new ProjectedGroup
+                            {
+                                Key = g.Key,
+                                Content = g.Select(doc => doc.SomeContent).ToList()
+                            });
+
+            // Assert
+            var key1Group = result.First(e => e.Key == 4);
+            Assert.NotNull(key1Group);
+            Assert.AreEqual(3, key1Group.Content.Count);
+            var key2Group = result.First(e => e.Key == 5);
+            Assert.NotNull(key2Group);
+            Assert.AreEqual(1, key2Group.Content.Count);
+        }
+    }
+}
diff --git a/IntegrationTests/Infrastructure/Child.cs b/IntegrationTests/Infrastructure/Child.cs
new file mode 100644
index 0000000..cf9d1ec
--- /dev/null
+++ b/IntegrationTests/Infrastructure/Child.cs
@@ -0,0 +1,14 @@
+namespace IntegrationTests.Infrastructure
+{
+    public class Child
+    {
+        public Child(string type, string value)
+        {
+            Type = type;
+            Value = value;
+        }
+
+        public string Type { get; set; }
+        public string Value { get; set; }
+    }
+}
diff --git a/IntegrationTests/IntegrationTests.csproj b/IntegrationTests/IntegrationTests.csproj
index f608e8b..d3bb63c 100644
--- a/IntegrationTests/IntegrationTests.csproj
+++ b/IntegrationTests/IntegrationTests.csproj
@@ -58,8 +58,10 @@
     <Compile Include="DeletePartitionedTests.cs" />
     <Compile Include="DeleteTKeyTests.cs" />
     <Compile Include="DeleteTests.cs" />
+    <Compile Include="GroupTests\GroupingTests.cs" />
     <Compile Include="Infrastructure\BaseMongoDbRepositoryTests.cs" />
     <Compile Include="CreatePartitionedTests.cs" />
+    <Compile Include="Infrastructure\Child.cs" />
     <Compile Include="Infrastructure\ITestRepository.cs" />
     <Compile Include="Infrastructure\TestRepository.cs" />
     <Compile Include="CreateTests.cs" />
diff --git a/IntegrationTests/UpdatePartitionedTKeyTests.cs b/IntegrationTests/UpdatePartitionedTKeyTests.cs
index 8cfb58a..41c66cf 100644
--- a/IntegrationTests/UpdatePartitionedTKeyTests.cs
+++ b/IntegrationTests/UpdatePartitionedTKeyTests.cs
@@ -1,8 +1,10 @@
 using IntegrationTests.Infrastructure;
 using MongoDB.Bson.Serialization.Attributes;
+using MongoDB.Driver;
 using MongoDbGenericRepository.Models;
 using NUnit.Framework;
 using System;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace IntegrationTests
@@ -18,9 +20,11 @@ namespace IntegrationTests
             Id = Guid.NewGuid();
             Version = 2;
             PartitionKey = "TestPartitionKey";
+            Children = new List<Child>();
         }
         public string PartitionKey { get; set; }
         public string SomeContent { get; set; }
+        public List<Child> Children { get; set; }
     }
 
     [TestFixture]
@@ -57,5 +61,57 @@ namespace IntegrationTests
             Assert.IsNotNull(updatedDocument);
             Assert.AreEqual("UpdateOneAsyncContent", updatedDocument.SomeContent);
         }
+
+        [Test]
+        public async Task UpdateOneAsyncWithUpdateDefinition()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<UpdateTestsPartitionedTKeyDocument, Guid>(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<UpdateTestsPartitionedTKeyDocument>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            // Act
+            var result = await SUT.UpdateOneAsync<UpdateTestsPartitionedTKeyDocument, Guid>(document, updateDef);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsPartitionedTKeyDocument, Guid>(document.Id, document.PartitionKey);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public void UpdateOneWithUpdateDefinition()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<UpdateTestsPartitionedTKeyDocument, Guid>(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<UpdateTestsPartitionedTKeyDocument>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            // Act
+            var result = SUT.UpdateOne<UpdateTestsPartitionedTKeyDocument, Guid>(document, updateDef);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsPartitionedTKeyDocument, Guid>(document.Id, document.PartitionKey);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
     }
 }
diff --git a/IntegrationTests/UpdatePartitionedTests.cs b/IntegrationTests/UpdatePartitionedTests.cs
index 3c0fa8a..fd7e3f9 100644
--- a/IntegrationTests/UpdatePartitionedTests.cs
+++ b/IntegrationTests/UpdatePartitionedTests.cs
@@ -1,6 +1,8 @@
 using IntegrationTests.Infrastructure;
+using MongoDB.Driver;
 using MongoDbGenericRepository.Models;
 using NUnit.Framework;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace IntegrationTests
@@ -10,8 +12,10 @@ namespace IntegrationTests
         public UpdateTestsPartitionedDocument() : base("TestPartitionKey")
         {
             Version = 2;
+            Children = new List<Child>();
         }
         public string SomeContent { get; set; }
+        public List<Child> Children { get; set; }
     }
 
     public class UpdatePartitionedTests : BaseMongoDbRepositoryTests<UpdateTestsPartitionedDocument>
@@ -47,5 +51,155 @@ namespace IntegrationTests
             Assert.IsNotNull(updatedDocument);
             Assert.AreEqual("UpdateOneAsyncContent", updatedDocument.SomeContent);
         }
+
+        [Test]
+        public async Task UpdateOneAsyncWithUpdateDefinition()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<UpdateTestsPartitionedDocument>(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<UpdateTestsPartitionedDocument>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            // Act
+            var result = await SUT.UpdateOneAsync<UpdateTestsPartitionedDocument>(document, updateDef);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsPartitionedDocument>(document.Id, document.PartitionKey);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public void UpdateOneWithUpdateDefinition()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<UpdateTestsPartitionedDocument>(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<UpdateTestsPartitionedDocument>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            // Act
+            var result = SUT.UpdateOne<UpdateTestsPartitionedDocument>(document, updateDef);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsPartitionedDocument>(document.Id, document.PartitionKey);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public void UpdateOneWithFieldSelector()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            // Act
+            var result = SUT.UpdateOne(document, x => x.Children, childrenToAdd);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsPartitionedDocument>(document.Id, document.PartitionKey);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public async Task UpdateOneAsyncWithFieldSelector()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            // Act
+            var result = await SUT.UpdateOneAsync(document, x => x.Children, childrenToAdd);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsPartitionedDocument>(document.Id, document.PartitionKey);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public void UpdateOneWithFilterAndFieldSelector()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            // Act
+            var filter = Builders<UpdateTestsPartitionedDocument>.Filter.Eq("Id", document.Id);
+            var result = SUT.UpdateOne(filter, x => x.Children, childrenToAdd, document.PartitionKey);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsPartitionedDocument>(document.Id, document.PartitionKey);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public async Task UpdateOneAsyncWithFilterAndFieldSelector()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            // Act
+            var filter = Builders<UpdateTestsPartitionedDocument>.Filter.Eq("Id", document.Id);
+            var result = await SUT.UpdateOneAsync(filter, x => x.Children, childrenToAdd, document.PartitionKey);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsPartitionedDocument>(document.Id, document.PartitionKey);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
     }
 }
diff --git a/IntegrationTests/UpdateTKeyTests.cs b/IntegrationTests/UpdateTKeyTests.cs
index bcb77aa..f981196 100644
--- a/IntegrationTests/UpdateTKeyTests.cs
+++ b/IntegrationTests/UpdateTKeyTests.cs
@@ -1,8 +1,10 @@
 using IntegrationTests.Infrastructure;
 using MongoDB.Bson.Serialization.Attributes;
+using MongoDB.Driver;
 using MongoDbGenericRepository.Models;
 using NUnit.Framework;
 using System;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace IntegrationTests
@@ -17,8 +19,10 @@ namespace IntegrationTests
         {
             Id = Guid.NewGuid();
             Version = 2;
+            Children = new List<Child>();
         }
         public string SomeContent { get; set; }
+        public List<Child> Children { get; set; }
     }
 
     [TestFixture]
@@ -55,5 +59,137 @@ namespace IntegrationTests
             Assert.IsNotNull(updatedDocument);
             Assert.AreEqual("UpdateOneAsyncContent", updatedDocument.SomeContent);
         }
+
+        [Test]
+        public async Task UpdateOneAsyncWithUpdateDefinition()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<UpdateTestsTKeyDocument, Guid>(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<UpdateTestsTKeyDocument>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+            // Act
+            var result = await SUT.UpdateOneAsync<UpdateTestsTKeyDocument, Guid>(document, updateDef);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsTKeyDocument, Guid>(document.Id);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public void UpdateOneWithUpdateDefinition()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<UpdateTestsTKeyDocument, Guid>(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<UpdateTestsTKeyDocument>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            // Act
+            var result = SUT.UpdateOne<UpdateTestsTKeyDocument, Guid>(document, updateDef);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsTKeyDocument, Guid>(document.Id);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public void UpdateOneWithFieldSelector()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<UpdateTestsTKeyDocument, Guid>(document);
+
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var filter = Builders<UpdateTestsTKeyDocument>.Filter.Eq("Id", document.Id);
+
+            // Act
+            var result = SUT.UpdateOne<UpdateTestsTKeyDocument, Guid, List<Child>>(document, x => x.Children, childrenToAdd);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsTKeyDocument, Guid>(document.Id);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public async Task UpdateOneAsyncWithFieldSelector()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<UpdateTestsTKeyDocument, Guid>(document);
+
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var filter = Builders<UpdateTestsTKeyDocument>.Filter.Eq("Id", document.Id);
+
+            // Act
+            var result = await SUT.UpdateOneAsync<UpdateTestsTKeyDocument, Guid, List<Child>>(document, x => x.Children, childrenToAdd);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsTKeyDocument, Guid>(document.Id);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public void UpdateOneWithFilterAndFieldSelector()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne<UpdateTestsTKeyDocument, Guid>(document);
+
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var filter = Builders<UpdateTestsTKeyDocument>.Filter.Eq("Id", document.Id);
+
+            // Act
+            var result = SUT.UpdateOne<UpdateTestsTKeyDocument, Guid, List<Child>>(filter, x => x.Children, childrenToAdd);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsTKeyDocument, Guid>(document.Id);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
     }
 }
diff --git a/IntegrationTests/UpdateTests.cs b/IntegrationTests/UpdateTests.cs
index 328c3f3..ee5bb17 100644
--- a/IntegrationTests/UpdateTests.cs
+++ b/IntegrationTests/UpdateTests.cs
@@ -1,6 +1,8 @@
 using IntegrationTests.Infrastructure;
+using MongoDB.Driver;
 using MongoDbGenericRepository.Models;
 using NUnit.Framework;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace IntegrationTests
@@ -10,8 +12,10 @@ namespace IntegrationTests
         public UpdateTestsDocument()
         {
             Version = 2;
+            Children = new List<Child>();
         }
         public string SomeContent { get; set; }
+        public List<Child> Children { get; set; }
     }
 
     public class UpdateTests : BaseMongoDbRepositoryTests<UpdateTestsDocument>
@@ -47,5 +51,155 @@ namespace IntegrationTests
             Assert.IsNotNull(updatedDocument);
             Assert.AreEqual("UpdateOneAsyncContent", updatedDocument.SomeContent);
         }
+
+        [Test]
+        public async Task UpdateOneAsyncWithUpdateDefinition()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<UpdateTestsDocument>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            // Act
+            var result = await SUT.UpdateOneAsync(document, updateDef);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsDocument>(document.Id);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public void UpdateOneWithUpdateDefinition()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            var updateDef = Builders<UpdateTestsDocument>.Update.AddToSetEach(p => p.Children, childrenToAdd);
+
+            // Act
+            var result = SUT.UpdateOne(document, updateDef);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsDocument>(document.Id);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public void UpdateOneWithFieldSelector()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            // Act
+            var result = SUT.UpdateOne(document, x => x.Children, childrenToAdd);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsDocument>(document.Id);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public async Task UpdateOneAsyncWithFieldSelector()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            // Act
+            var result = await SUT.UpdateOneAsync(document, x => x.Children, childrenToAdd);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsDocument>(document.Id);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public void UpdateOneWithFilterAndFieldSelector()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            // Act
+            var filter = Builders<UpdateTestsDocument>.Filter.Eq("Id", document.Id);
+            var result = SUT.UpdateOne(filter, x => x.Children, childrenToAdd);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsDocument>(document.Id);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
+
+        [Test]
+        public async Task UpdateOneAsyncWithFilterAndFieldSelector()
+        {
+            // Arrange
+            var document = CreateTestDocument();
+            SUT.AddOne(document);
+            var childrenToAdd = new List<Child>
+            {
+                new Child("testType1", "testValue1"),
+                new Child("testType2", "testValue2")
+            };
+
+            // Act
+            var filter = Builders<UpdateTestsDocument>.Filter.Eq("Id", document.Id);
+            var result = await SUT.UpdateOneAsync(filter, x => x.Children, childrenToAdd);
+            // Assert
+            Assert.IsTrue(result);
+            var updatedDocument = SUT.GetById<UpdateTestsDocument>(document.Id);
+            Assert.IsNotNull(updatedDocument);
+            Assert.AreEqual(childrenToAdd[0].Type, updatedDocument.Children[0].Type);
+            Assert.AreEqual(childrenToAdd[0].Value, updatedDocument.Children[0].Value);
+            Assert.AreEqual(childrenToAdd[1].Type, updatedDocument.Children[1].Type);
+            Assert.AreEqual(childrenToAdd[1].Value, updatedDocument.Children[1].Value);
+        }
     }
 }
diff --git a/MongoDbGenericRepository/BaseMongoDbRepository.cs b/MongoDbGenericRepository/BaseMongoDbRepository.cs
index 630a535..2b318ab 100644
--- a/MongoDbGenericRepository/BaseMongoDbRepository.cs
+++ b/MongoDbGenericRepository/BaseMongoDbRepository.cs
@@ -206,7 +206,7 @@ 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>
-        Task<TDocument> GetByIdAsync<TDocument, TKey>(Guid id, string partitionKey = null)
+        Task<TDocument> GetByIdAsync<TDocument, TKey>(TKey id, string partitionKey = null)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>;
 
@@ -217,7 +217,7 @@ 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>
-        TDocument GetById<TDocument, TKey>(Guid id, string partitionKey = null)
+        TDocument GetById<TDocument, TKey>(TKey id, string partitionKey = null)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>;
 
@@ -324,7 +324,6 @@ namespace MongoDbGenericRepository
 
         #endregion
 
-
         #region Update
 
         /// <summary>
@@ -341,6 +340,68 @@ namespace MongoDbGenericRepository
         /// <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>
+        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>
+        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>
+        /// 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>
+        /// 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
@@ -365,6 +426,80 @@ namespace MongoDbGenericRepository
             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>
+        /// 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>
+        /// 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>
+        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>
+        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
@@ -535,7 +670,6 @@ namespace MongoDbGenericRepository
 
         #endregion
 
-
         #region Project
 
         /// <summary>
@@ -692,6 +826,43 @@ namespace MongoDbGenericRepository
                                         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();
+
+        /// 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="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>
+        /// <returns></returns>
+        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
     }
 
     /// <summary>
@@ -1017,7 +1188,7 @@ 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>(Guid id, string partitionKey = null)
+        public async Task<TDocument> GetByIdAsync<TDocument, TKey>(TKey id, string partitionKey = null)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
@@ -1032,7 +1203,7 @@ 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>(Guid id, string partitionKey = null)
+        public TDocument GetById<TDocument, TKey>(TKey id, string partitionKey = null)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
         {
@@ -1194,6 +1365,98 @@ namespace MongoDbGenericRepository
             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>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        public async Task<bool> UpdateOneAsync<TDocument>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", documentToModify.Id);
+            var updateRes = await HandlePartitioned(documentToModify).UpdateOneAsync(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="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 bool UpdateOne<TDocument, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", documentToModify.Id);
+            var updateRes = HandlePartitioned(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="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 async Task<bool> UpdateOneAsync<TDocument, TField>(TDocument documentToModify, Expression<Func<TDocument, TField>> field, TField value)
+            where TDocument : IDocument
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", documentToModify.Id);
+            var updateRes = await HandlePartitioned(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="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>
+        public bool UpdateOne<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument
+        {
+            var collection = string.IsNullOrEmpty(partitionKey) ? GetCollection<TDocument>() : GetCollection<TDocument>(partitionKey);
+            var updateRes = collection.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="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>
+        public async Task<bool> UpdateOneAsync<TDocument, TField>(FilterDefinition<TDocument> filter, Expression<Func<TDocument, TField>> field, TField value, string partitionKey = null)
+            where TDocument : IDocument
+        {
+            var collection = string.IsNullOrEmpty(partitionKey) ? GetCollection<TDocument>() : GetCollection<TDocument>(partitionKey);
+            var updateRes = await collection.UpdateOneAsync(filter, Builders<TDocument>.Update.Set(field, value));
+            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>
+        /// <param name="documentToModify">The document you want to modify.</param>
+        /// <param name="update">The update definition for the document.</param>
+        public bool UpdateOne<TDocument>(TDocument documentToModify, UpdateDefinition<TDocument> update)
+            where TDocument : IDocument
+        {
+            var filter = Builders<TDocument>.Filter.Eq("Id", documentToModify.Id);
+            var updateRes = HandlePartitioned(documentToModify).UpdateOne(filter, update, new UpdateOptions { IsUpsert = true });
+            return updateRes.ModifiedCount == 1;
+        }
+
         #endregion Update
 
         #region Update TKey
@@ -1228,6 +1491,110 @@ namespace MongoDbGenericRepository
             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 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, new UpdateOptions { IsUpsert = true });
+            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 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, new UpdateOptions { IsUpsert = true });
+            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 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 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>
+        public 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>
+        /// 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>
+        public 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;
+        }
+
         #endregion Update
 
         #region Delete
@@ -1601,7 +1968,7 @@ namespace MongoDbGenericRepository
         /// <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="filter">The document filter.</param>
         /// <param name="projection">The projection expression.</param>
         /// <param name="partitionKey">An optional partition key.</param>
         public List<TProjection> ProjectMany<TDocument, TProjection, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
@@ -1614,6 +1981,60 @@ namespace MongoDbGenericRepository
                                                              .ToList();
         }
 
+        #endregion
+
+        #region Grouping
+
+        /// <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 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()
+        {
+            var collection = string.IsNullOrEmpty(partitionKey) ? GetCollection<TDocument>() : GetCollection<TDocument>(partitionKey);
+            return collection.Aggregate()
+                             .Group(groupingCriteria, groupProjection)
+                             .ToList();
+
+        }
+
+        /// 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="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>
+        /// <returns></returns>
+        public 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()
+        {
+            var collection = string.IsNullOrEmpty(partitionKey) ? GetCollection<TDocument>() : GetCollection<TDocument>(partitionKey);
+
+            return collection.Aggregate()
+                             .Match(Builders<TDocument>.Filter.Where(filter))
+                             .Group(selector, projection)
+                             .ToList();
+        }
+
+
         #endregion
 
         /// <summary>
@@ -1732,7 +2153,6 @@ namespace MongoDbGenericRepository
             }
         }
 
-
         private IMongoCollection<TDocument> GetCollection<TDocument, TKey>(string partitionKey)
             where TDocument : IDocument<TKey>
             where TKey : IEquatable<TKey>
diff --git a/MongoDbGenericRepository/MongoDbGenericRepository.nuspec b/MongoDbGenericRepository/MongoDbGenericRepository.nuspec
index 92ed6a0..2847dd6 100644
--- a/MongoDbGenericRepository/MongoDbGenericRepository.nuspec
+++ b/MongoDbGenericRepository/MongoDbGenericRepository.nuspec
@@ -2,7 +2,7 @@
 <package >
   <metadata>
     <id>MongoDbGenericRepository</id>
-    <version>1.2.2</version>
+    <version>1.3</version>
     <title>MongoDb Generic Repository</title>
     <authors>Alexandre Spieser</authors>
     <owners>Alexandre Spieser</owners>
diff --git a/MongoDbGenericRepository/lib/net45/MongoDbGenericRepository.xml b/MongoDbGenericRepository/lib/net45/MongoDbGenericRepository.xml
index 618ae3f..9a99a51 100644
--- a/MongoDbGenericRepository/lib/net45/MongoDbGenericRepository.xml
+++ b/MongoDbGenericRepository/lib/net45/MongoDbGenericRepository.xml
@@ -174,7 +174,7 @@
             <param name="filter">A LINQ expression filter.</param>
             <param name="partitionKey">An optional partition key.</param>
         </member>
-        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.GetByIdAsync``2(System.Guid,System.String)">
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.GetByIdAsync``2(``1,System.String)">
             <summary>
             Asynchronously returns one document given its id.
             </summary>
@@ -183,7 +183,7 @@
             <param name="id">The Id of the document you want to get.</param>
             <param name="partitionKey">An optional partition key.</param>
         </member>
-        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.GetById``2(System.Guid,System.String)">
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.GetById``2(``1,System.String)">
             <summary>
             Returns one document given its id.
             </summary>
@@ -287,6 +287,62 @@
             <typeparam name="TDocument">The type representing a Document.</typeparam>
             <param name="modifiedDocument">The document with the modifications you want to persist.</param>
         </member>
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.UpdateOne``2(MongoDB.Driver.FilterDefinition{``0},System.Linq.Expressions.Expression{System.Func{``0,``1}},``1,System.String)">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.UpdateOneAsync``2(MongoDB.Driver.FilterDefinition{``0},System.Linq.Expressions.Expression{System.Func{``0,``1}},``1,System.String)">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.UpdateOne``2(``0,System.Linq.Expressions.Expression{System.Func{``0,``1}},``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="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>
+        </member>
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.UpdateOneAsync``2(``0,System.Linq.Expressions.Expression{System.Func{``0,``1}},``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="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>
+        </member>
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.UpdateOneAsync``1(``0,MongoDB.Driver.UpdateDefinition{``0})">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.UpdateOne``1(``0,MongoDB.Driver.UpdateDefinition{``0})">
+            <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>
+        </member>
         <member name="M:MongoDbGenericRepository.IBaseMongoRepository.UpdateOneAsync``2(``0)">
             <summary>
             Asynchronously Updates a document.
@@ -303,6 +359,68 @@
             <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>
         </member>
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.UpdateOneAsync``2(``0,MongoDB.Driver.UpdateDefinition{``0})">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.UpdateOne``2(``0,MongoDB.Driver.UpdateDefinition{``0})">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.UpdateOneAsync``3(``0,System.Linq.Expressions.Expression{System.Func{``0,``2}},``2)">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.UpdateOne``3(``0,System.Linq.Expressions.Expression{System.Func{``0,``2}},``2)">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.UpdateOneAsync``3(MongoDB.Driver.FilterDefinition{``0},System.Linq.Expressions.Expression{System.Func{``0,``2}},``2,System.String)">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.UpdateOne``3(MongoDB.Driver.FilterDefinition{``0},System.Linq.Expressions.Expression{System.Func{``0,``2}},``2,System.String)">
+            <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>
+        </member>
         <member name="M:MongoDbGenericRepository.IBaseMongoRepository.DeleteOneAsync``1(``0)">
             <summary>
             Asynchronously deletes a document.
@@ -573,6 +691,19 @@
             <param name="options"></param>
             <returns></returns>
         </member>
+        <member name="M:MongoDbGenericRepository.IBaseMongoRepository.GroupBy``3(System.Linq.Expressions.Expression{System.Func{``0,``1}},System.Linq.Expressions.Expression{System.Func{System.Linq.IGrouping{``1,``0},``2}},System.String)">
+            <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>
+        </member>
+        <!-- Commentaire XML incorrect pour le membre "M:MongoDbGenericRepository.IBaseMongoRepository.GroupBy``3(System.Linq.Expressions.Expression{System.Func{``0,System.Boolean}},System.Linq.Expressions.Expression{System.Func{``0,``1}},System.Linq.Expressions.Expression{System.Func{System.Linq.IGrouping{``1,``0},``2}},System.String)" -->
         <member name="T:MongoDbGenericRepository.BaseMongoRepository">
             <summary>
             The base Repository, it is meant to be inherited from by your custom custom MongoRepository implementation.
@@ -763,7 +894,7 @@
             <param name="filter">A LINQ expression filter.</param>
             <param name="partitionKey">An optional partitionKey</param>
         </member>
-        <member name="M:MongoDbGenericRepository.BaseMongoRepository.GetByIdAsync``2(System.Guid,System.String)">
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.GetByIdAsync``2(``1,System.String)">
             <summary>
             Asynchronously returns one document given its id.
             </summary>
@@ -772,7 +903,7 @@
             <param name="id">The Id of the document you want to get.</param>
             <param name="partitionKey">An optional partition key.</param>
         </member>
-        <member name="M:MongoDbGenericRepository.BaseMongoRepository.GetById``2(System.Guid,System.String)">
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.GetById``2(``1,System.String)">
             <summary>
             Returns one document given its id.
             </summary>
@@ -876,6 +1007,62 @@
             <typeparam name="TDocument">The type representing a Document.</typeparam>
             <param name="modifiedDocument">The document with the modifications you want to persist.</param>
         </member>
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.UpdateOneAsync``1(``0,MongoDB.Driver.UpdateDefinition{``0})">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.UpdateOne``2(``0,System.Linq.Expressions.Expression{System.Func{``0,``1}},``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="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>
+        </member>
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.UpdateOneAsync``2(``0,System.Linq.Expressions.Expression{System.Func{``0,``1}},``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="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>
+        </member>
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.UpdateOne``2(MongoDB.Driver.FilterDefinition{``0},System.Linq.Expressions.Expression{System.Func{``0,``1}},``1,System.String)">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.UpdateOneAsync``2(MongoDB.Driver.FilterDefinition{``0},System.Linq.Expressions.Expression{System.Func{``0,``1}},``1,System.String)">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.UpdateOne``1(``0,MongoDB.Driver.UpdateDefinition{``0})">
+            <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>
+        </member>
         <member name="M:MongoDbGenericRepository.BaseMongoRepository.UpdateOneAsync``2(``0)">
             <summary>
             Asynchronously Updates a document.
@@ -892,6 +1079,68 @@
             <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>
         </member>
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.UpdateOneAsync``2(``0,MongoDB.Driver.UpdateDefinition{``0})">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.UpdateOne``2(``0,MongoDB.Driver.UpdateDefinition{``0})">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.UpdateOneAsync``3(``0,System.Linq.Expressions.Expression{System.Func{``0,``2}},``2)">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.UpdateOne``3(``0,System.Linq.Expressions.Expression{System.Func{``0,``2}},``2)">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.UpdateOneAsync``3(MongoDB.Driver.FilterDefinition{``0},System.Linq.Expressions.Expression{System.Func{``0,``2}},``2,System.String)">
+            <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>
+        </member>
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.UpdateOne``3(MongoDB.Driver.FilterDefinition{``0},System.Linq.Expressions.Expression{System.Func{``0,``2}},``2,System.String)">
+            <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>
+        </member>
         <member name="M:MongoDbGenericRepository.BaseMongoRepository.DeleteOneAsync``1(``0)">
             <summary>
             Asynchronously deletes a document.
@@ -1116,10 +1365,23 @@
             <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="filter">The document filter.</param>
             <param name="projection">The projection expression.</param>
             <param name="partitionKey">An optional partition key.</param>
         </member>
+        <member name="M:MongoDbGenericRepository.BaseMongoRepository.GroupBy``3(System.Linq.Expressions.Expression{System.Func{``0,``1}},System.Linq.Expressions.Expression{System.Func{System.Linq.IGrouping{``1,``0},``2}},System.String)">
+            <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>
+        </member>
+        <!-- Commentaire XML incorrect pour le membre "M:MongoDbGenericRepository.BaseMongoRepository.GroupBy``3(System.Linq.Expressions.Expression{System.Func{``0,System.Boolean}},System.Linq.Expressions.Expression{System.Func{``0,``1}},System.Linq.Expressions.Expression{System.Func{System.Linq.IGrouping{``1,``0},``2}},System.String)" -->
         <member name="M:MongoDbGenericRepository.BaseMongoRepository.GetPaginatedAsync``1(System.Linq.Expressions.Expression{System.Func{``0,System.Boolean}},System.Int32,System.Int32,System.String)">
             <summary>
             Asynchronously returns a paginated list of the documents matching the filter condition.