Microsoft Robotics Developer Studio 2008 is a platform for developing robotics applications. The RDS 2008 R3 download is now available as a single Edition at no cost. It will also be available from MSDN, MSDNAA, DreamSpark or BizSpark. The Robotics web site has been updated with new information

for codelex sample see this
http://mrdssamples.codeplex.com/

and for learning see this link
http://www.microsoft.com/learning/en/us/book.aspx?ID=11308&locale=en-us