I downloaded VS 2010 Premium and started working with that yesterday. I am trying to configure an EventToCommand using DevExpress, which is guess work since they don't have Blend ability. Anyway, I get an error when I try and run:
Error: Could not load file or assembly 'System.Windows.Interactivity, Version=18.104.22.168, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference.
I have tried using the GAC version of the Interactivity assembly as well as the one you provide and I get the same error. Any clues?