I've uploaded a very crude windows app that I used to test the sketch api. The app shows how to get lists of boards, libraries and compile/upload.

If anyone wants to have a go at creating or extending avr studio or any other dev tool than feel free to try it out.

The api might change slightly in th future but the basics will be the same.

The compiler application simply requires a path to an arduino sketch and that the arduino exe location has been set in the kk_current_user/software/visual micro/locations registry

You can find the source of the app on codeplex under TestApp. You will see that the app is something that I have put zero time into but it works well

If you want to make a .net3.5 build then use/reference the sketch.08.dll instead of the referenced sketch.dll. The sketch 08 is installed with visual micro. Just grab a copy of it.