diff --git a/IntegrationTests/IntegrationTests.csproj b/IntegrationTests/IntegrationTests.csproj
index ac1c4ef..ec385c5 100644
--- a/IntegrationTests/IntegrationTests.csproj
+++ b/IntegrationTests/IntegrationTests.csproj
@@ -11,7 +11,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>IntegrationTests</RootNamespace>
     <AssemblyName>IntegrationTests</AssemblyName>
-    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <NuGetPackageImportStamp>
     </NuGetPackageImportStamp>
diff --git a/MongoDbGenericRepository/Abstractions/IReadOnlyMongoRepository.TKey.cs b/MongoDbGenericRepository/Abstractions/IReadOnlyMongoRepository.TKey.cs
index 4290a2b..6e93142 100644
--- a/MongoDbGenericRepository/Abstractions/IReadOnlyMongoRepository.TKey.cs
+++ b/MongoDbGenericRepository/Abstractions/IReadOnlyMongoRepository.TKey.cs
@@ -253,7 +253,6 @@ namespace MongoDbGenericRepository
         /// 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>
@@ -346,7 +345,6 @@ namespace MongoDbGenericRepository
         /// Asynchronously returns a paginated list of the documents matching the filter condition.
         /// </summary>
         /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="filter">A LINQ expression filter.</param>
         /// <param name="sortSelector">The property selector.</param>
         /// <param name="ascending">Order of the sorting.</param>
@@ -366,7 +364,6 @@ namespace MongoDbGenericRepository
         /// Asynchronously returns a paginated list of the documents matching the filter condition.
         /// </summary>
         /// <typeparam name="TDocument">The type representing a Document.</typeparam>
-        /// <typeparam name="TKey">The type of the primary key for a Document.</typeparam>
         /// <param name="filter">A LINQ expression filter.</param>
         /// <param name="sortDefinition">The sort definition.</param>
         /// <param name="skipNumber">The number of documents you want to skip. Default value is 0.</param>
diff --git a/MongoDbGenericRepository/BaseMongoRepository.Create.cs b/MongoDbGenericRepository/BaseMongoRepository.Create.cs
index 13465b4..53e37fa 100644
--- a/MongoDbGenericRepository/BaseMongoRepository.Create.cs
+++ b/MongoDbGenericRepository/BaseMongoRepository.Create.cs
@@ -14,7 +14,7 @@ namespace MongoDbGenericRepository
     public abstract partial class BaseMongoRepository : IBaseMongoRepository_Create
     {
         private readonly object _initLock = new object();
-        private volatile IMongoDbCreator _mongoDbCreator;
+        private IMongoDbCreator _mongoDbCreator;
 
         /// <summary>
         /// The MongoDbCreator field.
diff --git a/MongoDbGenericRepository/BaseMongoRepository.Delete.cs b/MongoDbGenericRepository/BaseMongoRepository.Delete.cs
index a5e8748..5974289 100644
--- a/MongoDbGenericRepository/BaseMongoRepository.Delete.cs
+++ b/MongoDbGenericRepository/BaseMongoRepository.Delete.cs
@@ -9,8 +9,8 @@ namespace MongoDbGenericRepository
 {
     public abstract partial class BaseMongoRepository : IBaseMongoRepository_Delete
     {
-        private volatile IMongoDbEraser _mongoDbEraser;
-        
+        private IMongoDbEraser _mongoDbEraser;
+
         /// <summary>
         /// The MongoDbEraser used to delete documents.
         /// </summary>
diff --git a/MongoDbGenericRepository/BaseMongoRepository.Index.cs b/MongoDbGenericRepository/BaseMongoRepository.Index.cs
index f77af83..90741a6 100644
--- a/MongoDbGenericRepository/BaseMongoRepository.Index.cs
+++ b/MongoDbGenericRepository/BaseMongoRepository.Index.cs
@@ -13,7 +13,7 @@ namespace MongoDbGenericRepository
     /// </summary>
     public abstract partial class BaseMongoRepository : IBaseMongoRepository_Index
     {
-        private volatile IMongoDbIndexHandler _mongoDbIndexHandler;
+        private IMongoDbIndexHandler _mongoDbIndexHandler;
 
         /// <summary>
         /// The MongoDb accessor to manage indexes.
diff --git a/MongoDbGenericRepository/BaseMongoRepository.Update.cs b/MongoDbGenericRepository/BaseMongoRepository.Update.cs
index 7bc1497..6e96164 100644
--- a/MongoDbGenericRepository/BaseMongoRepository.Update.cs
+++ b/MongoDbGenericRepository/BaseMongoRepository.Update.cs
@@ -13,7 +13,7 @@ namespace MongoDbGenericRepository
     /// </summary>
     public abstract partial class BaseMongoRepository : IBaseMongoRepository_Update
     {
-        private volatile IMongoDbUpdater _mongoDbUpdater;
+        private IMongoDbUpdater _mongoDbUpdater;
 
         /// <summary>
         /// The MongoDb accessor to update data.
diff --git a/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Create.cs b/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Create.cs
index 850e1a4..abd4833 100644
--- a/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Create.cs
+++ b/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Create.cs
@@ -14,7 +14,7 @@ namespace MongoDbGenericRepository
     public abstract partial class BaseMongoRepository<TKey> : IBaseMongoRepository_Create<TKey> 
         where TKey : IEquatable<TKey>
     {
-        private volatile IMongoDbCreator _mongoDbCreator;
+        private IMongoDbCreator _mongoDbCreator;
 
         /// <summary>
         /// The MongoDb accessor to insert data.
diff --git a/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Delete.cs b/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Delete.cs
index b77ad4f..8d48668 100644
--- a/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Delete.cs
+++ b/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Delete.cs
@@ -10,7 +10,7 @@ namespace MongoDbGenericRepository
     public abstract partial class BaseMongoRepository<TKey>: IBaseMongoRepository_Delete<TKey> 
         where TKey : IEquatable<TKey>
     {
-        private volatile IMongoDbEraser _mongoDbEraser;
+        private IMongoDbEraser _mongoDbEraser;
 
         /// <summary>
         /// The MongoDb accessor to delete data.
diff --git a/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Index.cs b/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Index.cs
index 2e37414..b7e56ce 100644
--- a/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Index.cs
+++ b/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Index.cs
@@ -14,7 +14,7 @@ namespace MongoDbGenericRepository
     public abstract partial class BaseMongoRepository<TKey> : IBaseMongoRepository_Index<TKey>
         where TKey : IEquatable<TKey>
     {
-        private volatile IMongoDbIndexHandler _mongoDbIndexHandler;
+        private IMongoDbIndexHandler _mongoDbIndexHandler;
 
         /// <summary>
         /// The MongoDb accessor to manage indexes.
diff --git a/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.ReadOnly.cs b/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.ReadOnly.cs
index 626670a..55691d4 100644
--- a/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.ReadOnly.cs
+++ b/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.ReadOnly.cs
@@ -390,15 +390,7 @@ namespace MongoDbGenericRepository
 
         #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>
+        /// <inheritdoc cref="IReadOnlyMongoRepository"/>
         public virtual async Task<TProjection> ProjectOneAsync<TDocument, TProjection>(Expression<Func<TDocument, bool>> filter, Expression<Func<TDocument, TProjection>> projection, string partitionKey = null)
             where TDocument : IDocument<TKey>
             where TProjection : class
diff --git a/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Update.cs b/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Update.cs
index 9da9cfc..53015c1 100644
--- a/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Update.cs
+++ b/MongoDbGenericRepository/KeyTypedRepository/BaseMongoRepository.TKey.Update.cs
@@ -10,7 +10,7 @@ namespace MongoDbGenericRepository
     public abstract partial class BaseMongoRepository<TKey> : IBaseMongoRepository_Update<TKey>
         where TKey : IEquatable<TKey>
     {
-        private volatile IMongoDbUpdater _mongoDbUpdater;
+        private IMongoDbUpdater _mongoDbUpdater;
 
         /// <summary>
         /// The MongoDb accessor to update data.