ran tests + removed obsolete methods

IntegrationTests/Infrastructure/MongoDBDocumentTestBase.cs

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

IntegrationTests/Infrastructure/MongoDbTKeyDocumentTestBase.cs

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