Desktop oAuth with .NET http://www.voiceoftech.com/swhitley/?p=856
This example includes an updated version of oAuth.cs and oAuthTwitter.cs It includes some changes to url encoding that one of my blog readers submitted. Those two files could be used in the web versions with minor adjustments. I'll go back and incorporate the changes into the original web example too. I also need to contact the oAuth.cs author to request code updates at the Google source. I should have an xAuth example out this week as well.