Merge pull request #18 from alexandre-spieser/alex/refactorForKeyTypeRepo

Alex/refactor for key type repo
2019-04-14 19:36:44 +01:00
parent 43677b72a1 2207f2f1a1
commit c92a126ecc
28 changed files with 4906 additions and 3092 deletions
@@ -768,7 +768,8 @@ namespace CoreIntegrationTests.Infrastructure
            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
            var documents = CreateTestDocuments(5);
            var i = 1;
-            documents.ForEach(e => {
+            documents.ForEach(e =>
            {
                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
                e.SomeContent = criteria;
            });
@@ -790,7 +791,8 @@ namespace CoreIntegrationTests.Infrastructure
            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
            var documents = CreateTestDocuments(5);
            var i = 1;
-            documents.ForEach(e => {
+            documents.ForEach(e =>
            {
                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
                e.SomeContent = criteria;
            });
@@ -812,7 +814,8 @@ namespace CoreIntegrationTests.Infrastructure
            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
            var documents = CreateTestDocuments(5);
            var i = 1;
-            documents.ForEach(e => {
+            documents.ForEach(e =>
            {
                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
                e.SomeContent = criteria;
            });
@@ -834,7 +837,8 @@ namespace CoreIntegrationTests.Infrastructure
            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
            var documents = CreateTestDocuments(5);
            var i = 1;
-            documents.ForEach(e => {
+            documents.ForEach(e =>
            {
                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
                e.SomeContent = criteria;
            });
@@ -856,7 +860,8 @@ namespace CoreIntegrationTests.Infrastructure
            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
            var documents = CreateTestDocuments(5);
            var i = 1;
-            documents.ForEach(e => {
+            documents.ForEach(e =>
            {
                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
                e.SomeContent = criteria;
            });
@@ -878,7 +883,8 @@ namespace CoreIntegrationTests.Infrastructure
            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
            var documents = CreateTestDocuments(5);
            var i = 1;
-            documents.ForEach(e => {
+            documents.ForEach(e =>
            {
                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
                e.SomeContent = criteria;
            });
@@ -900,7 +906,8 @@ namespace CoreIntegrationTests.Infrastructure
            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
            var documents = CreateTestDocuments(5);
            var i = 1;
-            documents.ForEach(e => {
+            documents.ForEach(e =>
            {
                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
                e.SomeContent = criteria;
            });
@@ -922,7 +929,8 @@ namespace CoreIntegrationTests.Infrastructure
            var criteria = $"{GetTestName()}.{DocumentTypeName}.{Guid.NewGuid()}";
            var documents = CreateTestDocuments(5);
            var i = 1;
-            documents.ForEach(e => {
+            documents.ForEach(e =>
            {
                e.Nested.SomeDate = e.Nested.SomeDate.AddDays(i++);
                e.SomeContent = criteria;
            });
@@ -1056,6 +1064,7 @@ namespace CoreIntegrationTests.Infrastructure
            // Act
            Expression<Func<T, object>> ex = x => x.SomeContent4;
            Expression<Func<T, object>> ex2 = x => x.SomeContent5;
            var result = await SUT.CreateCombinedTextIndexAsync<T, TKey>(new[] { ex, ex2 }, null, PartitionKey);
            // Assert
@@ -1119,6 +1128,7 @@ namespace CoreIntegrationTests.Infrastructure
        #endregion Math
        #region Test Utils
        [MethodImpl(MethodImplOptions.NoInlining)]
        private string GetCurrentMethod()
        {
@@ -8,605 +8,16 @@ using System.Linq;
 namespace MongoDbGenericRepository
 {
    /// <summary>
    /// The IBaseMongoRepository exposes the CRUD functionality of the BaseMongoRepository.
    /// </summary>
-    public interface IBaseMongoRepository : IReadOnlyMongoRepository, IMongoDbCollectionIndexRepository
+    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>
        /// <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;
        /// <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="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;
        /// <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>
        /// <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>;
        #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>
@@ -654,45 +65,6 @@ 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
    }
 }
@@ -0,0 +1,410 @@
 using MongoDB.Driver;
 using MongoDbGenericRepository.Models;
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Linq.Expressions;
 using System.Threading.Tasks;
 namespace MongoDbGenericRepository
 {
    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>
        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
        #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="orderByAscending">A property selector to order by descending.</param>
        /// <param name="partitionKey">An optional partitionKey.</param>
        Task<TDocument> GetByMaxAsync<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 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="orderByAscending">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="orderByAscending">A property selector to order by ascending.</param>
        /// <param name="partitionKey">An optional partitionKey.</param>
        Task<TDocument> GetByMinAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> orderByAscending, 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="orderByAscending">A property selector to order by ascending.</param>
        /// <param name="partitionKey">An optional partitionKey.</param>
        TDocument GetByMin<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> orderByAscending, 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>
        /// <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<TValue> GetMaxValueAsync<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 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>
        /// <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>
        TValue GetMaxValue<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> orderByDescending, 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>
        Task<TValue> GetMinValueAsync<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> minValueSelector, 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>
        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>
        /// <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, 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>
        /// <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>
        /// <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>
        /// <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"></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="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"></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="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>
        /// <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>
        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>
        /// <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
    }
 }
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Linq.Expressions;
 using System.Threading.Tasks;
 using MongoDB.Driver;
@@ -7,8 +8,7 @@ using MongoDbGenericRepository.Models;
 namespace MongoDbGenericRepository
 {
-    public interface IKeyTypedReadOnlyMongoRepository<TKey> : IBaseReadOnlyRepository 
+    public interface IReadOnlyMongoRepository<TKey> where TKey : IEquatable<TKey>
        where TKey : IEquatable<TKey>
    {
        #region Read
@@ -242,5 +242,98 @@ namespace MongoDbGenericRepository
            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
    }
 }
@@ -1,11 +1,16 @@
-using System;
+using MongoDbGenericRepository.Models;
 using System;
 using System.Collections.Generic;
 using System.Linq.Expressions;
 using System.Threading.Tasks;
 namespace MongoDbGenericRepository
 {
    /// <summary>
    /// The IReadOnlyMongoRepository exposes the readonly functionality of the BaseMongoRepository.
    /// </summary>
-    public interface IReadOnlyMongoRepository : IBaseReadOnlyRepository, IKeyTypedReadOnlyMongoRepository<Guid>
+    public interface IReadOnlyMongoRepository : IBaseReadOnlyRepository, IReadOnlyMongoRepository<Guid>
    {
    }
 }
@@ -1,176 +0,0 @@
 using MongoDB.Driver;
 using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using System.Linq.Expressions;
 using MongoDbGenericRepository.Models;
 using System.Linq;
 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
    {
        #region Index Management
        /// <inheritdoc />
        public async Task<string> CreateTextIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
            where TDocument : IDocument
        {
            return await CreateTextIndexAsync<TDocument, Guid>(field, indexCreationOptions, partitionKey);
        }
        /// <inheritdoc />
        public async 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)
                                                                   ));
        }
        /// <inheritdoc />
        public async Task<string> CreateAscendingIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null) where TDocument : IDocument
        {
            return await CreateAscendingIndexAsync<TDocument, Guid>(field, indexCreationOptions, partitionKey);
        }
        /// <inheritdoc />
        public async 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));
        }
        /// <inheritdoc />
        public async Task<string> CreateDescendingIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
            where TDocument : IDocument
        {
            return await CreateDescendingIndexAsync<TDocument, Guid>(field, indexCreationOptions, partitionKey);
        }
        /// <inheritdoc />
        public async 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));
        }
        /// <inheritdoc />
        public async Task<string> CreateHashedIndexAsync<TDocument>(Expression<Func<TDocument, object>> field, IndexCreationOptions indexCreationOptions = null, string partitionKey = null)
            where TDocument : IDocument
        {
            return await CreateHashedIndexAsync<TDocument, Guid>(field, indexCreationOptions, partitionKey);
        }
        /// <inheritdoc />
        public async 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));
        }
        /// <inheritdoc />
        public async Task<string> CreateCombinedTextIndexAsync<TDocument>(IEnumerable<Expression<Func<TDocument, object>>> fields, IndexCreationOptions indexCreationOptions = null, string partitionKey = null) where TDocument : IDocument
        {
            return await CreateCombinedTextIndexAsync<TDocument, Guid>(fields, indexCreationOptions, partitionKey);
        }
        /// <inheritdoc />
        public async 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));
        }
        /// <inheritdoc />
        public async Task DropIndexAsync<TDocument>(string indexName, string partitionKey = null)
            where TDocument : IDocument
        {
            await DropIndexAsync<TDocument, Guid>(indexName, partitionKey);
        }
        /// <inheritdoc />
        public async 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);
        }
        /// <inheritdoc />
        public async Task<List<string>> GetIndexesNamesAsync<TDocument>(string partitionKey = null)
            where TDocument : IDocument
        {
            return await GetIndexesNamesAsync<TDocument, Guid>(partitionKey);
        }
        /// <inheritdoc />
        public async 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();
        }
        #endregion Index Management
        private 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,
                BucketSize = indexCreationOptions.BucketSize,
                Bits = indexCreationOptions.Bits,
                Background = indexCreationOptions.Background,
                Version = indexCreationOptions.Version
            };
        }
    }
 }
@@ -0,0 +1,186 @@
 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 MongoDbCreator MongoDbCreator
        {
            get
            {
                if (_mongoDbCreator != null) { return _mongoDbCreator; }
                lock (_initLock)
                {
                    if (_mongoDbCreator == null)
                    {
                        _mongoDbCreator = new MongoDbCreator(MongoDbContext);
                    }
                }
                return _mongoDbCreator;
            }
        }
        /// <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);
        }
    }
 }
@@ -0,0 +1,343 @@
 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 MongoDbEraser MongoDbEraser
        {
            get
            {
                if (_mongoDbEraser != null) { return _mongoDbEraser; }
                lock (_initLock)
                {
                    if (_mongoDbEraser == null)
                    {
                        _mongoDbEraser = new MongoDbEraser(MongoDbContext);
                    }
                }
                return _mongoDbEraser;
            }
        }
        #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
    }
 }
@@ -0,0 +1,319 @@
 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 MongoDbIndexHandler MongoDbIndexHandler
        {
            get
            {
                if (_mongoDbIndexHandler != null) { return _mongoDbIndexHandler; }
                lock (_initLock)
                {
                    if (_mongoDbIndexHandler == null)
                    {
                        _mongoDbIndexHandler = new MongoDbIndexHandler(MongoDbContext);
                    }
                }
                return _mongoDbIndexHandler;
            }
        }
        /// <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);
        }
    }
 }
@@ -0,0 +1,211 @@
 using MongoDB.Driver;
 using MongoDbGenericRepository.Models;
 using MongoDbGenericRepository.Utils;
 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 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="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
        {
            var sorting = ascending
                ? Builders<TDocument>.Sort.Ascending(sortSelector)
                : Builders<TDocument>.Sort.Descending(sortSelector);
            return await HandlePartitioned<TDocument>(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>
        /// <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);
        }
    }
 }
@@ -0,0 +1,457 @@
 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 : 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>
    /// 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 MongoDbUpdater MongoDbUpdater
        {
            get
            {
                if (_mongoDbUpdater != null) { return _mongoDbUpdater; }
                lock (_initLock)
                {
                    if (_mongoDbUpdater == null)
                    {
                        _mongoDbUpdater = new MongoDbUpdater(MongoDbContext);
                    }
                }
                return _mongoDbUpdater;
            }
        }
        #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);
        }
        #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);
        }
        #endregion Update
    }
 }
@@ -1,843 +0,0 @@
 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.Tasks;
 namespace MongoDbGenericRepository
 {
    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>
        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
        #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="orderByAscending">A property selector to order by descending.</param>
        /// <param name="partitionKey">An optional partitionKey.</param>
        Task<TDocument> GetByMaxAsync<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 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="orderByAscending">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="orderByAscending">A property selector to order by ascending.</param>
        /// <param name="partitionKey">An optional partitionKey.</param>
        Task<TDocument> GetByMinAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> orderByAscending, 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="orderByAscending">A property selector to order by ascending.</param>
        /// <param name="partitionKey">An optional partitionKey.</param>
        TDocument GetByMin<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> orderByAscending, 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>
        /// <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<TValue> GetMaxValueAsync<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 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>
        /// <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>
        TValue GetMaxValue<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> orderByDescending, 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>
        Task<TValue> GetMinValueAsync<TDocument, TKey, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> minValueSelector, 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>
        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>
        /// <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, 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>
        /// <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>
        /// <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>
        /// <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
    }
    public class BaseReadOnlyRepository : IBaseReadOnlyRepository
    {
        /// <summary>
        /// The connection string.
        /// </summary>
        public string ConnectionString { get; }
        /// <summary>
        /// The database name.
        /// </summary>
        public string DatabaseName { get; }
        /// <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 BaseReadOnlyRepository(string connectionString, string databaseName = null)
        {
            if (databaseName == null)
            {
                var mongoUrl = new MongoUrl(connectionString);
                databaseName = databaseName ?? mongoUrl.DatabaseName;
            }
            ConnectionString = connectionString;
            DatabaseName = 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 BaseReadOnlyRepository(IMongoDbContext mongoDbContext)
        {
            MongoDbContext = mongoDbContext;
        }
        /// <summary>
        /// The contructor taking a <see cref="IMongoDatabase"/>.
        /// </summary>
        /// <param name="mongoDatabase">A mongodb context implementing <see cref="IMongoDatabase"/></param>
        protected BaseReadOnlyRepository(IMongoDatabase mongoDatabase)
        {
            MongoDbContext = new MongoDbContext(mongoDatabase);
        }
        #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>
        public async Task<TDocument> GetByIdAsync<TDocument, TKey>(TKey id, string partitionKey = null)
            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();
        }
        /// <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 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>
        public async Task<TDocument> GetOneAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            return await HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).FirstOrDefaultAsync();
        }
        /// <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 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 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>
        public async Task<bool> AnyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            var count = await HandlePartitioned<TDocument, TKey>(partitionKey).CountDocumentsAsync(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>
        /// <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)
            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>
        public async Task<List<TDocument>> GetAllAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            return await HandlePartitioned<TDocument, TKey>(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>
        /// <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)
            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>
        public async Task<long> CountAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            return await HandlePartitioned<TDocument, TKey>(partitionKey).CountDocumentsAsync(filter);
        }
        /// <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 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();
        }
        /// <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 async Task<TDocument> GetByMaxAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> maxValueSelector, string partitionKey = null)
            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();
        }
        /// <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 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>
        public async Task<TDocument> GetByMinAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> minValueSelector, string partitionKey = null)
            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();
        }
        /// <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 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 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>
        private 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>
        private 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);
        }
        /// <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>
        /// <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>
        public async Task<TValue> GetMaxValueAsync<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 await GetMaxMongoQuery<TDocument, TKey, TValue>(filter, maxValueSelector, partitionKey)
                                .Project(maxValueSelector)
                                .FirstOrDefaultAsync();
        }
        /// <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 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>
        public virtual async Task<TValue> GetMinValueAsync<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 await GetMinMongoQuery<TDocument, TKey, TValue>(filter, minValueSelector, partitionKey).Project(minValueSelector).FirstOrDefaultAsync();
        }
        /// <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
        #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>
        /// <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, TKey>(Expression<Func<TDocument, bool>> filter,
                                                       Expression<Func<TDocument, int>> selector,
                                                       string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            return await GetQuery<TDocument, TKey>(filter, partitionKey).SumAsync(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>
        /// <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>
        /// <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>
        {
            return await GetQuery<TDocument, TKey>(filter, partitionKey).SumAsync(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>
        /// <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 Sums TKey
        #region Utility Methods
        protected 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>
        protected 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>
        protected 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>
        protected 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 static 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);
        }
        #endregion
    }
 }
@@ -0,0 +1,158 @@
 using MongoDB.Driver;
 using MongoDB.Driver.Linq;
 using MongoDbGenericRepository.Models;
 using System;
 using System.Linq;
 using System.Linq.Expressions;
 namespace MongoDbGenericRepository.DataAccess.Base
 {
    public class DataAccessBase
    {
        protected IMongoDbContext MongoDbContext;
        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,
                BucketSize = indexCreationOptions.BucketSize,
                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
    }
 }
@@ -1,4 +1,6 @@
 using MongoDB.Driver;
 using MongoDB.Driver.Linq;
 using MongoDbGenericRepository.DataAccess.Base;
 using MongoDbGenericRepository.Models;
 using MongoDbGenericRepository.Utils;
 using System;
@@ -6,52 +8,29 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
-namespace MongoDbGenericRepository
+namespace MongoDbGenericRepository.DataAccess.Create
 {
-    /// <summary>
+    public class MongoDbCreator : DataAccessBase
    /// 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"></typeparam>
    public abstract class KeyTypedBaseMongoDbRepository<TKey> : KeyTypedReadOnlyMongoRepository<TKey>, IKeyTypedReadOnlyMongoRepository<TKey> where TKey : IEquatable<TKey>
    {
-        /// <summary>
+        public MongoDbCreator(IMongoDbContext mongoDbContext) : base(mongoDbContext)
        /// 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 KeyTypedBaseMongoDbRepository(string connectionString, string databaseName = null) : base(connectionString, databaseName)
        {
        }
-        /// <summary>
+        #region Create TKey
        /// The contructor taking a <see cref="IMongoDbContext"/>.
        /// </summary>
        /// <param name="mongoDbContext">A mongodb context implementing <see cref="IMongoDbContext"/></param>
        protected KeyTypedBaseMongoDbRepository(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 KeyTypedBaseMongoDbRepository(IMongoDatabase mongoDatabase) : base(mongoDatabase)
        {
        }
        #region Create
        /// <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>(TDocument document) where TDocument : IDocument<TKey>
+        public virtual async Task AddOneAsync<TDocument, TKey>(TDocument document)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
-            FormatDocument(document);
+            FormatDocument<TDocument, TKey>(document);
-            await HandlePartitioned(document).InsertOneAsync(document);
+            await HandlePartitioned<TDocument, TKey>(document).InsertOneAsync(document);
        }
        /// <summary>
@@ -59,11 +38,14 @@ namespace MongoDbGenericRepository
        /// 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>(TDocument document) where TDocument : IDocument<TKey>
+        public virtual void AddOne<TDocument, TKey>(TDocument document)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
-            FormatDocument(document);
+            FormatDocument<TDocument, TKey>(document);
-            HandlePartitioned(document).InsertOne(document);
+            HandlePartitioned<TDocument, TKey>(document).InsertOne(document);
        }
        /// <summary>
@@ -71,8 +53,11 @@ namespace MongoDbGenericRepository
        /// 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>(IEnumerable<TDocument> documents) where TDocument : IDocument<TKey>
+        public virtual async Task AddManyAsync<TDocument, TKey>(IEnumerable<TDocument> documents)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            if (!documents.Any())
            {
@@ -80,19 +65,19 @@ namespace MongoDbGenericRepository
            }
            foreach (var document in documents)
            {
-                FormatDocument(document);
+                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(group.FirstOrDefault()).InsertManyAsync(group.ToList());
+                    await HandlePartitioned<TDocument, TKey>(group.FirstOrDefault()).InsertManyAsync(group.ToList());
                }
            }
            else
            {
-                await GetCollection<TDocument>().InsertManyAsync(documents.ToList());
+                await GetCollection<TDocument, TKey>().InsertManyAsync(documents.ToList());
            }
        }
@@ -101,8 +86,11 @@ namespace MongoDbGenericRepository
        /// 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>(IEnumerable<TDocument> documents) where TDocument : IDocument<TKey>
+        public virtual void AddMany<TDocument, TKey>(IEnumerable<TDocument> documents)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            if (!documents.Any())
            {
@@ -110,30 +98,33 @@ namespace MongoDbGenericRepository
            }
            foreach (var document in documents)
            {
-                FormatDocument(document);
+                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(group.FirstOrDefault()).InsertMany(group.ToList());
+                    HandlePartitioned<TDocument, TKey>(group.FirstOrDefault()).InsertMany(group.ToList());
                }
            }
            else
            {
-                GetCollection<TDocument>().InsertMany(documents.ToList());
+                GetCollection<TDocument, TKey>().InsertMany(documents.ToList());
            }
        }
-        #endregion Create
+        #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>(TDocument document) where TDocument : IDocument<TKey>
+        protected void FormatDocument<TDocument, TKey>(TDocument document)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            if (document == null)
            {
@@ -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
    }
 }
@@ -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);
        }
    }
 }
@@ -0,0 +1,448 @@
 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.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>
        public async virtual Task<TDocument> GetByIdAsync<TDocument, TKey>(TKey id, string partitionKey = null)
            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();
        }
        /// <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>
        public async virtual Task<TDocument> GetOneAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            return await HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter).FirstOrDefaultAsync();
        }
        /// <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>
        public async virtual Task<bool> AnyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            var count = await HandlePartitioned<TDocument, TKey>(partitionKey).CountDocumentsAsync(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>
        /// <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>
        public async virtual Task<List<TDocument>> GetAllAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            return await HandlePartitioned<TDocument, TKey>(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>
        /// <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>
        public async virtual Task<long> CountAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            return await HandlePartitioned<TDocument, TKey>(partitionKey).CountDocumentsAsync(filter);
        }
        /// <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>
        public async virtual Task<TDocument> GetByMaxAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> maxValueSelector, string partitionKey = null)
            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();
        }
        /// <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>
        public async virtual Task<TDocument> GetByMinAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> minValueSelector, string partitionKey = null)
            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();
        }
        /// <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>
        /// <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>
        public async virtual Task<TValue> GetMaxValueAsync<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 await GetMaxMongoQuery<TDocument, TKey, TValue>(filter, maxValueSelector, partitionKey)
                                .Project(maxValueSelector)
                                .FirstOrDefaultAsync();
        }
        /// <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>
        public virtual async Task<TValue> GetMinValueAsync<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 await GetMinMongoQuery<TDocument, TKey, TValue>(filter, minValueSelector, partitionKey).Project(minValueSelector).FirstOrDefaultAsync();
        }
        /// <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>
        /// <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, TKey>(Expression<Func<TDocument, bool>> filter,
                                                       Expression<Func<TDocument, int>> selector,
                                                       string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            return await GetQuery<TDocument, TKey>(filter, partitionKey).SumAsync(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>
        /// <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>
        /// <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>
        {
            return await GetQuery<TDocument, TKey>(filter, partitionKey).SumAsync(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>
        /// <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="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="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();
        }
    }
 }
@@ -0,0 +1,90 @@
 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.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>
        public virtual async 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
        {
            return await HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter)
                                                                         .Project(projection)
                                                                         .FirstOrDefaultAsync();
        }
        /// <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>
        public virtual async 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
        {
            return await HandlePartitioned<TDocument, TKey>(partitionKey).Find(filter)
                                                                   .Project(projection)
                                                                   .ToListAsync();
        }
        /// <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();
        }
    }
 }
@@ -0,0 +1,190 @@
 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.Linq.Expressions;
 using System.Threading.Tasks;
 namespace MongoDbGenericRepository.DataAccess.Update
 {
    public 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, 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 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, 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 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);
        }
    }
 }
@@ -0,0 +1,114 @@
 using MongoDbGenericRepository.DataAccess.Create;
 using MongoDbGenericRepository.Models;
 using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
 namespace MongoDbGenericRepository
 {
    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>
    /// <typeparam name="TKey"></typeparam>
    public abstract partial class BaseMongoRepository<TKey> : IBaseMongoRepository_Create<TKey> where TKey : IEquatable<TKey>
    {
        protected MongoDbCreator _mongoDbCreator;
        protected MongoDbCreator MongoDbCreator
        {
            get
            {
                if(_mongoDbCreator == null)
                {
                    lock (_initLock)
                    {
                        if(_mongoDbCreator == null)
                        {
                            _mongoDbCreator = new MongoDbCreator(MongoDbContext);
                        }
                    }
                }
                return _mongoDbCreator;
            }
        }
        /// <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);
        }
    }
 }
@@ -0,0 +1,226 @@
 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<TKey> where TKey : IEquatable<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>(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>
        /// <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>(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>
        /// <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>(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>
        /// <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>(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>
        /// <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>(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>
        /// <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>(IEnumerable<TDocument> documents)
            where TDocument : IDocument<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>(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>
        /// <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>(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;
        protected MongoDbEraser MongoDbEraser
        {
            get
            {
                if (_mongoDbEraser != null) { return _mongoDbEraser; }
                lock (_initLock)
                {
                    if (_mongoDbEraser == null)
                    {
                        _mongoDbEraser = new MongoDbEraser(MongoDbContext);
                    }
                }
                return _mongoDbEraser;
            }
        }
        /// <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>(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>
        /// <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>(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>
        /// <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>(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>
        /// <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>(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>
        /// <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>(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>
        /// <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>(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>
        /// <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>(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>
        /// <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>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
        {
            return MongoDbEraser.DeleteMany<TDocument, TKey>(filter, partitionKey);
        }
    }
 }
@@ -1,4 +1,5 @@
-using MongoDbGenericRepository.Models;
+using MongoDbGenericRepository.DataAccess.Index;
 using MongoDbGenericRepository.Models;
 using System;
 using System.Collections.Generic;
 using System.Linq.Expressions;
@@ -6,11 +7,17 @@ using System.Threading.Tasks;
 namespace MongoDbGenericRepository
 {
-    /// <summary>
+    public interface IBaseMongoRepository_Index<TKey> where TKey : IEquatable<TKey>
    /// The repository interface for managing indexes
    /// </summary>
    public interface IMongoDbCollectionIndexRepository
    {
        /// <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 
@@ -22,22 +29,7 @@ namespace MongoDbGenericRepository
        /// <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;
+            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>
        /// <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.
@@ -49,22 +41,8 @@ namespace MongoDbGenericRepository
        /// <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;
+        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 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.
@@ -75,24 +53,9 @@ namespace MongoDbGenericRepository
        /// <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>A string containing the result of the operation.</returns>
+        /// <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;
+            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>
        /// <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.
@@ -103,24 +66,9 @@ namespace MongoDbGenericRepository
        /// <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>A string containing the result of the operation.</returns>
+        /// <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;
+            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>
        /// <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.
@@ -133,22 +81,7 @@ namespace MongoDbGenericRepository
        /// <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;
+            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>
        /// <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
@@ -157,37 +90,137 @@ namespace MongoDbGenericRepository
        /// <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;
+            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>
    /// <typeparam name="TKey"></typeparam>
    public abstract partial class BaseMongoRepository<TKey> : IBaseMongoRepository_Index<TKey>
        where TKey : IEquatable<TKey>
    {
        private MongoDbIndexHandler _mongoDbIndexHandler;
        protected MongoDbIndexHandler MongoDbIndexHandler
        {
            get
            {
                if (_mongoDbIndexHandler != null) { return _mongoDbIndexHandler; }
                lock (_initLock)
                {
                    if (_mongoDbIndexHandler == null)
                    {
                        _mongoDbIndexHandler = new MongoDbIndexHandler(MongoDbContext);
                    }
                }
                return _mongoDbIndexHandler;
            }
        }
        /// <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>
        /// <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)
+        public async virtual Task DropIndexAsync<TDocument>(string indexName, string partitionKey = null)
            where TDocument : IDocument<TKey>
-            where TKey : IEquatable<TKey>;
+        {
-
+            await MongoDbIndexHandler.DropIndexAsync<TDocument, TKey>(indexName, 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>
        Task<List<string>> GetIndexesNamesAsync<TDocument>(string partitionKey = null)
            where TDocument : IDocument;
        /// <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>;
    }
 }
@@ -0,0 +1,82 @@
 using MongoDB.Driver;
 using MongoDbGenericRepository.Models;
 using System;
 namespace MongoDbGenericRepository
 {
    public interface IBaseMongoDbRepository<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"></typeparam>
    public abstract partial class BaseMongoRepository<TKey> : 
        ReadOnlyMongoRepository<TKey>, 
        IBaseMongoDbRepository<TKey>
        where TKey : IEquatable<TKey>
    {
        protected 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);
        }
    }
 }
@@ -1,5 +1,5 @@
 using MongoDB.Driver;
-using MongoDB.Driver.Linq;
+using MongoDbGenericRepository.DataAccess.Read;
 using MongoDbGenericRepository.Models;
 using System;
 using System.Collections.Generic;
@@ -13,14 +13,43 @@ namespace MongoDbGenericRepository
    /// 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 class KeyTypedReadOnlyMongoRepository<TKey> : BaseReadOnlyRepository, IKeyTypedReadOnlyMongoRepository<TKey> where TKey : IEquatable<TKey>
+    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 KeyTypedReadOnlyMongoRepository(string connectionString, string databaseName = null) : base(connectionString, databaseName)
+        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))
        {
        }
@@ -28,16 +57,27 @@ namespace MongoDbGenericRepository
        /// The contructor taking a <see cref="IMongoDbContext"/>.
        /// </summary>
        /// <param name="mongoDbContext">A mongodb context implementing <see cref="IMongoDbContext"/></param>
-        protected KeyTypedReadOnlyMongoRepository(IMongoDbContext mongoDbContext) : base(mongoDbContext)
+        protected ReadOnlyMongoRepository(IMongoDbContext mongoDbContext)
        {
            SetupMongoDbContext(mongoDbContext);
        }
-        /// <summary>
+        protected void SetupMongoDbContext(IMongoDbContext mongoDbContext)
        /// The contructor taking a <see cref="IMongoDatabase"/>.
        /// </summary>
        /// <param name="mongoDatabase">A mongodb context implementing <see cref="IMongoDatabase"/></param>
        protected KeyTypedReadOnlyMongoRepository(IMongoDatabase mongoDatabase) : base(mongoDatabase)
        {
            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
@@ -50,7 +90,7 @@ namespace MongoDbGenericRepository
        /// <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 base.GetByIdAsync<TDocument, TKey>(id, partitionKey);
+            return await MongoDbReader.GetByIdAsync<TDocument, TKey>(id, partitionKey);
        }
        /// <summary>
@@ -61,7 +101,7 @@ namespace MongoDbGenericRepository
        /// <param name="partitionKey">An optional partition key.</param>
        public TDocument GetById<TDocument>(TKey id, string partitionKey = null) where TDocument : IDocument<TKey>
        {
-            return base.GetById<TDocument, TKey>(id, partitionKey);
+            return MongoDbReader.GetById<TDocument, TKey>(id, partitionKey);
        }
        /// <summary>
@@ -72,7 +112,7 @@ namespace MongoDbGenericRepository
        /// <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 base.GetOneAsync<TDocument, TKey>(filter, partitionKey);
+            return await MongoDbReader.GetOneAsync<TDocument, TKey>(filter, partitionKey);
        }
        /// <summary>
@@ -83,7 +123,7 @@ namespace MongoDbGenericRepository
        /// <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 base.GetOne<TDocument, TKey>(filter, partitionKey);
+            return MongoDbReader.GetOne<TDocument, TKey>(filter, partitionKey);
        }
        /// <summary>
@@ -94,7 +134,7 @@ namespace MongoDbGenericRepository
        /// <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 base.GetCursor<TDocument, TKey>(filter, partitionKey);
+            return MongoDbReader.GetCursor<TDocument, TKey>(filter, partitionKey);
        }
        /// <summary>
@@ -105,7 +145,7 @@ namespace MongoDbGenericRepository
        /// <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 base.AnyAsync<TDocument, TKey>(filter, partitionKey);
+            return await MongoDbReader.AnyAsync<TDocument, TKey>(filter, partitionKey);
        }
        /// <summary>
@@ -116,7 +156,7 @@ namespace MongoDbGenericRepository
        /// <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 base.Any<TDocument, TKey>(filter, partitionKey);
+            return MongoDbReader.Any<TDocument, TKey>(filter, partitionKey);
        }
        /// <summary>
@@ -127,7 +167,7 @@ namespace MongoDbGenericRepository
        /// <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 base.GetAllAsync<TDocument, TKey>(filter, partitionKey);
+            return await MongoDbReader.GetAllAsync<TDocument, TKey>(filter, partitionKey);
        }
        /// <summary>
@@ -138,7 +178,7 @@ namespace MongoDbGenericRepository
        /// <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 base.GetAll<TDocument, TKey>(filter, partitionKey);
+            return MongoDbReader.GetAll<TDocument, TKey>(filter, partitionKey);
        }
        /// <summary>
@@ -149,7 +189,7 @@ namespace MongoDbGenericRepository
        /// <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 base.CountAsync<TDocument, TKey>(filter, partitionKey);
+            return await MongoDbReader.CountAsync<TDocument, TKey>(filter, partitionKey);
        }
        /// <summary>
@@ -160,7 +200,7 @@ namespace MongoDbGenericRepository
        /// <param name="partitionKey">An optional partitionKey</param>
        public long Count<TDocument>(Expression<Func<TDocument, bool>> filter, string partitionKey = null) where TDocument : IDocument<TKey>
        {
-            return base.Count<TDocument, TKey>(filter, partitionKey);
+            return MongoDbReader.Count<TDocument, TKey>(filter, partitionKey);
        }
        /// <summary>
@@ -173,7 +213,7 @@ namespace MongoDbGenericRepository
        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 base.GetByMaxAsync<TDocument, TKey>(filter, maxValueSelector, partitionKey);
+            return await MongoDbReader.GetByMaxAsync<TDocument, TKey>(filter, maxValueSelector, partitionKey);
        }
        /// <summary>
@@ -187,7 +227,7 @@ namespace MongoDbGenericRepository
        public TDocument GetByMax<TDocument>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> maxValueSelector, string partitionKey = null)
            where TDocument : IDocument<TKey>
        {
-            return base.GetByMax<TDocument, TKey>(filter, maxValueSelector, partitionKey);
+            return MongoDbReader.GetByMax<TDocument, TKey>(filter, maxValueSelector, partitionKey);
        }
        /// <summary>
@@ -200,7 +240,7 @@ namespace MongoDbGenericRepository
        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 base.GetByMinAsync<TDocument, TKey>(filter, minValueSelector, partitionKey);
+            return await MongoDbReader.GetByMinAsync<TDocument, TKey>(filter, minValueSelector, partitionKey);
        }
        /// <summary>
@@ -213,7 +253,7 @@ namespace MongoDbGenericRepository
        public TDocument GetByMin<TDocument>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> minValueSelector, string partitionKey = null)
            where TDocument : IDocument<TKey>
        {
-            return base.GetByMin<TDocument, TKey>(filter, minValueSelector, partitionKey);
+            return MongoDbReader.GetByMin<TDocument, TKey>(filter, minValueSelector, partitionKey);
        }
        /// <summary>
@@ -227,7 +267,7 @@ namespace MongoDbGenericRepository
        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 base.GetMaxValueAsync<TDocument, TKey, TValue>(filter, maxValueSelector, partitionKey);
+            return await MongoDbReader.GetMaxValueAsync<TDocument, TKey, TValue>(filter, maxValueSelector, partitionKey);
        }
        /// <summary>
@@ -241,7 +281,7 @@ namespace MongoDbGenericRepository
        public TValue GetMaxValue<TDocument, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> maxValueSelector, string partitionKey = null)
            where TDocument : IDocument<TKey>
        {
-            return base.GetMaxValue<TDocument, TKey, TValue>(filter, maxValueSelector, partitionKey);
+            return MongoDbReader.GetMaxValue<TDocument, TKey, TValue>(filter, maxValueSelector, partitionKey);
        }
        /// <summary>
@@ -255,7 +295,7 @@ namespace MongoDbGenericRepository
        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 base.GetMinValueAsync<TDocument, TKey, TValue>(filter, minValueSelector, partitionKey);
+            return await MongoDbReader.GetMinValueAsync<TDocument, TKey, TValue>(filter, minValueSelector, partitionKey);
        }
        /// <summary>
@@ -269,7 +309,7 @@ namespace MongoDbGenericRepository
        public virtual TValue GetMinValue<TDocument, TValue>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TValue>> minValueSelector, string partitionKey = null)
            where TDocument : IDocument<TKey>
        {
-            return base.GetMinValue<TDocument, TKey, TValue>(filter, minValueSelector, partitionKey);
+            return MongoDbReader.GetMinValue<TDocument, TKey, TValue>(filter, minValueSelector, partitionKey);
        }
        #endregion
@@ -288,7 +328,7 @@ namespace MongoDbGenericRepository
                                                       string partitionKey = null)
            where TDocument : IDocument<TKey>
        {
-            return await base.SumByAsync<TDocument, TKey>(filter, selector, partitionKey);
+            return await MongoDbReader.SumByAsync<TDocument, TKey>(filter, selector, partitionKey);
        }
        /// <summary>
@@ -303,7 +343,7 @@ namespace MongoDbGenericRepository
                                                       string partitionKey = null)
            where TDocument : IDocument<TKey>
        {
-            return await base.SumByAsync<TDocument, TKey>(filter, selector, partitionKey);
+            return await MongoDbReader.SumByAsync<TDocument, TKey>(filter, selector, partitionKey);
        }
        /// <summary>
@@ -318,7 +358,7 @@ namespace MongoDbGenericRepository
                                                       string partitionKey = null)
            where TDocument : IDocument<TKey>
        {
-            return base.SumBy<TDocument, TKey>(filter, selector, partitionKey);
+            return MongoDbReader.SumBy<TDocument, TKey>(filter, selector, partitionKey);
        }
        /// <summary>
@@ -333,58 +373,117 @@ namespace MongoDbGenericRepository
                                                       string partitionKey = null)
            where TDocument : IDocument<TKey>
        {
-            return base.SumBy<TDocument, TKey>(filter, selector, partitionKey);
+            return MongoDbReader.SumBy<TDocument, TKey>(filter, selector, partitionKey);
        }
        #endregion Maths
-        #region Utility Methods
+        #region Project
        /// <summary>
-        /// Gets a collections for the type TDocument with the matching partition key (if any).
+        /// Asynchronously returns a projected document matching the filter condition.
        /// </summary>
-        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <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>
-        /// <returns>An <see cref="IMongoCollection{TDocument}"/></returns>
+        public virtual async Task<TProjection> ProjectOneAsync<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
-        protected virtual IMongoCollection<TDocument> GetCollection<TDocument>(string partitionKey = null) where TDocument : IDocument<TKey>
+            where TDocument : IDocument<TKey>
            where TProjection : class
        {
-            return MongoDbContext.GetCollection<TDocument>(partitionKey);
+            return await MongoDbReader.ProjectOneAsync<TDocument, TProjection, TKey>(filter, projection, partitionKey);
        }
        /// <summary>
-        /// Gets a collections for a potentially partitioned document type.
+        /// Returns a projected document matching the filter condition.
        /// </summary>
-        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
-        /// <param name="document">The document.</param>
+        /// <param name="filter">A LINQ expression filter.</param>
-        /// <returns></returns>
+        /// <param name="projection">The projection expression.</param>
-        protected virtual IMongoCollection<TDocument> HandlePartitioned<TDocument>(TDocument document)
+        /// <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
        {
-            if (document is IPartitionedDocument)
+            return MongoDbReader.ProjectOne<TDocument, TProjection, TKey>(filter, projection, partitionKey);
            {
                return GetCollection<TDocument>(((IPartitionedDocument)document).PartitionKey);
            }
            return GetCollection<TDocument>();
        }
        /// <summary>
-        /// Gets a collections for a potentially partitioned document type.
+        /// Asynchronously returns a list of projected documents matching the filter condition.
        /// </summary>
-        /// <typeparam name="TDocument">The document type.</typeparam>
+        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key.</typeparam>
+        /// <typeparam name="TProjection">The type representing the model you want to project to.</typeparam>
-        /// <param name="partitionKey">The collection partition key.</param>
+        /// <param name="filter">A LINQ expression filter.</param>
-        /// <returns></returns>
+        /// <param name="projection">The projection expression.</param>
-        protected virtual IMongoCollection<TDocument> HandlePartitioned<TDocument>(string partitionKey)
+        /// <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
        {
-            if (!string.IsNullOrEmpty(partitionKey))
+            return await MongoDbReader.ProjectManyAsync<TDocument, TProjection, TKey>(filter, projection, partitionKey);
            {
                return GetCollection<TDocument>(partitionKey);
            }
            return GetCollection<TDocument>();
        }
-        #endregion
+        /// <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);
        }
    }
 }
@@ -0,0 +1,269 @@
 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>;
    }
    public abstract partial class BaseMongoRepository<TKey> : IBaseMongoRepository_Update<TKey>
        where TKey : IEquatable<TKey>
    {
        private MongoDbUpdater _mongoDbUpdater;
        protected MongoDbUpdater MongoDbUpdater
        {
            get
            {
                if (_mongoDbUpdater != null) { return _mongoDbUpdater; }
                lock (_initLock)
                {
                    if (_mongoDbUpdater == null)
                    {
                        _mongoDbUpdater = new MongoDbUpdater(MongoDbContext);
                    }
                }
                return _mongoDbUpdater;
            }
        }
        /// <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);
        }
    }
 }
@@ -21,24 +21,6 @@ namespace MongoDbGenericRepository
        /// </summary>
        public IMongoDatabase Database { get; }
        /// <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>
        /// 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>
        /// The constructor of the MongoDbContext, it needs an object implementing <see cref="IMongoDatabase"/>.
@@ -76,24 +58,12 @@ namespace MongoDbGenericRepository
            Database = client.GetDatabase(databaseName);
        }
        /// <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>()
        {
            return (typeof(TDocument).GetTypeInfo()
                                     .GetCustomAttributes(typeof(CollectionNameAttribute))
                                     .FirstOrDefault() as CollectionNameAttribute)?.Name;
        }
        /// <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 IMongoCollection<TDocument> GetCollection<TDocument>(string partitionKey = null)
+        public virtual IMongoCollection<TDocument> GetCollection<TDocument>(string partitionKey = null)
        {
            return Database.GetCollection<TDocument>(GetCollectionName<TDocument>(partitionKey));
        }
@@ -102,18 +72,49 @@ namespace MongoDbGenericRepository
        /// Drops a collection, use very carefully.
        /// </summary>
        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        public void DropCollection<TDocument>(string partitionKey = null)
+        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>
        protected virtual string GetAttributeCollectionName<TDocument>()
        {
            return (typeof(TDocument).GetTypeInfo()
                                     .GetCustomAttributes(typeof(CollectionNameAttribute))
                                     .FirstOrDefault() as CollectionNameAttribute)?.Name;
        }
        /// <summary>
        /// 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>
        /// <returns>The name of the collection.</returns>
-        private string GetCollectionName<TDocument>(string partitionKey)
+        protected virtual string GetCollectionName<TDocument>(string partitionKey)
        {
            var collectionName = GetAttributeCollectionName<TDocument>() ?? Pluralize<TDocument>();
            if (string.IsNullOrEmpty(partitionKey))
@@ -128,7 +129,7 @@ namespace MongoDbGenericRepository
        /// </summary>
        /// <typeparam name="TDocument">The type representing a Document.</typeparam>
        /// <returns>The pluralized document name.</returns>
-        private string Pluralize<TDocument>()
+        protected virtual string Pluralize<TDocument>()
        {
            return (typeof(TDocument).Name.Pluralize()).Camelize();
        }
@@ -1,5 +1,11 @@
 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
 {
@@ -7,7 +13,7 @@ namespace MongoDbGenericRepository
    /// 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 class ReadOnlyMongoRepository : KeyTypedReadOnlyMongoRepository<Guid>, IReadOnlyMongoRepository
+    public abstract class ReadOnlyMongoRepository : ReadOnlyMongoRepository<Guid>, IReadOnlyMongoRepository
    {
        /// <summary>
        /// The constructor taking a connection string and a database name.
@@ -33,5 +39,534 @@ namespace MongoDbGenericRepository
        protected ReadOnlyMongoRepository(IMongoDatabase mongoDatabase) : base(mongoDatabase)
        {
        }
        #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>
        public async virtual Task<TDocument> GetByIdAsync<TDocument, TKey>(TKey id, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<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>
        /// <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>
        {
            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>
        /// <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 virtual Task<TDocument> GetOneAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<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>
        /// <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 MongoDbReader.GetOne<TDocument, TKey>(filter, partitionKey);
        }
        /// <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 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>
        /// <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 virtual Task<bool> AnyAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<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>
        /// <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>
        {
            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>
        /// <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 virtual Task<List<TDocument>> GetAllAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<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>
        /// <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 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>
        /// <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 virtual Task<long> CountAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<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>
        /// <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 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>
        public async virtual Task<TDocument> GetByMaxAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> maxValueSelector, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<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>
        /// <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 to order by ascending.</param>
        /// <param name="partitionKey">An optional partitionKey.</param>
        public async virtual Task<TDocument> GetByMinAsync<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, object>> minValueSelector, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>
        {
            return await MongoDbReader.GetByMinAsync<TDocument, TKey>(filter, minValueSelector, 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 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 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>
        /// <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>
        public async virtual Task<TValue> GetMaxValueAsync<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 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="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>
        public virtual async Task<TValue> GetMinValueAsync<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 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="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 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>
        /// <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, TKey>(Expression<Func<TDocument, bool>> filter,
                                                       Expression<Func<TDocument, int>> selector,
                                                       string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<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, TKey>(Expression<Func<TDocument, bool>> filter,
                                                       Expression<Func<TDocument, int>> selector,
                                                       string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<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 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>
        {
            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 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 MongoDbReader.SumBy<TDocument, TKey>(filter, selector, partitionKey);
        }
        #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>
        public virtual async 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
        {
            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="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>
        public virtual async 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
        {
            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="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="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, 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="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
        /// <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>
        {
            return MongoDbReader.HandlePartitioned<TDocument, TKey>(document);
        }
        /// <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>
        /// 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>(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);
        }
    }
 }