With normal .net applications in the properties window you can change the .net framework of your application from 3.5 to 2.0.
I'm looking for something like that for a pocket pc application, because I get an error on my pocket pc that my app requires a newer version of .net. and I can't find it anywhere in the properties.
Unfortunately it's not in the properties. For some (really stupid) reason you can upgrade a 2.0 project to 3.5 with a right click of the mouse, but there's no going back in the IDE. FOrtunately it's really easy still. Open the project in any text editor (including Studio if you have the accelerators installed) and change the Target Framework node back to 2.0.