I had a jolly good fun time tonight updating my code samples to the March CTP of Orcas.  Well, actually, I'm not quite finished as of yet because of the wonderful error in the title of this post.  It appears VS.NET Orcas doesn't want to let me recreate my data connection for my database that I'm using for some LINQ to SQL examples. Woot!  Hopefully I'll figure out what the dealy is shortly because I've got chapters I need to finish. :)