DOCS-12433: .NET driver link fixes (#621)

Author: nathan-contino-mongo

source/drivers/csharp.txt

@@ -22,19 +22,19 @@ with MongoDB.
 
 - :csharp-docs-latest:`Getting Started </getting_started/>`
 
-- `Usage Guide <http://mongodb.github.io/mongo-csharp-driver/?jmp=docs>`__
-
-- :api:`API Reference <csharp/current?jmp=docs>`
+- :csharp-docs-latest:`API Reference </apidocs/html/R_Project_CSharpDriverDocs.htm>`
 
 - :csharp-docs-latest:`Changelog </what_is_new/>`
 
-- `Source Code <https://github.com/mongodb/mongo-csharp-driver>`__
+- `Source Code <https://github.com/mongodb/mongo-csharp-driver>`_
 
 
 Installation
 ------------
 
-``NuGet`` is the simplest way to get the driver. `MongoDB.Driver <http://www.nuget.org/packages/mongodb.driver>`__ should be used for all new projects.
+``NuGet`` is the simplest way to get the driver. Use
+`MongoDB.Driver <http://www.nuget.org/packages/mongodb.driver>`_ for
+all new projects.
 
 For more information, see :csharp-docs-latest:`Installation
 </getting_started/installation/>`.
@@ -43,7 +43,8 @@ For more information, see :csharp-docs-latest:`Installation
 Connect to MongoDB Atlas
 ------------------------
 
-To connect to a :atlas:`MongoDB Atlas </>` cluster, use the :atlas:`Atlas connection string </driver-connection>` for your cluster:
+To connect to a :atlas:`MongoDB Atlas </>` cluster, use the
+:atlas:`Atlas connection string </driver-connection>` for your cluster:
 
 .. code-block:: csharp