This asp.net example shows how to use Codeplexes asp.net facebook Login/Post to wall in iframe/canvas of facebook app. This is just an example of login, but you can deploy other facebook applications in same way. This project is using latest stable version wich is 184.108.40.206 written in .net 4.0. You can test this example here
Happy Coding :D!
b.t.w. this example can be downloaded here