The Facebook SDK needed updating for sometime and it is freshly updated as of 7/11/2011.  Download and get started creating cool Facebook apps!

http://facebooksdk.codeplex.com/

If you have questions make sure to go to the http://stackoverflow.com and use the tag ‘facebook-c#-sdk’ for help.

Professors:

Use this to demonstrate the use of the open source C# language in your class and in the real world! 

College Students:

Use this to build a business around consulting with businesses on how to build facebook presence!