>Are you running on Client profile or jus full framework?
A mix, but don't worry, I did notice that System.Runtime.Caching does require the full framework, not the client profile. In my case I would tend to use caching in more heavyweight web or server-side components where that's not a problem. I'm guessing most people would feel that way - Greg P.S. Congratulations on getting a feature article in the latest MSDN Magazine <http://msdn.microsoft.com/en-us/magazine/hh852593.aspx> . That'll look good on your CV.
