Microsoft Video Link Collection

Silverlight
http://silverlight.net/learn
http://www.silverlight.net/learn/videos/all/

ASP + AJAX + MVC
http://asp.net/learn
http://www.asp.net/ajax/videos
http://www.asp.net/mvc/videos
http://www.asp.net/web-forms

Winform
http://windowsclient.net/learn
http://windowsclient.net/learn/videos.aspx

The rest of the How do I?
http://msdn.microsoft.com/en-us/bb629407.aspx