DOCSP-39419 Update C# Driver and EF descriptions (#187)

Author: jordan-smith721

source/languages/csharp.txt

@@ -24,13 +24,19 @@ Driver
 ------
 
 Provides a high-level API for working with MongoDB databases consistent with
-other MongoDB language drivers.
+other MongoDB language drivers and includes a LINQ provider for
+.NET-native query access and powerful aggregation and transformation queries.
 
 `C# Driver Documentation → <https://www.mongodb.com/docs/drivers/csharp/current/>`__
 
 Framework
 ---------
 
+The Entity Framework Core Provider allows you to use MongoDB with Microsoft's
+Entity Framework Core as an object-relational mapper. You can
+manipulate data by using LINQ queries and Entity Framework's entity-based
+modeling and change tracking.
+
 `Get Started With the Entity Framework Core Provider → <https://www.mongodb.com/docs/entity-framework/current/>`__
 
 Libraries and Extensions