.NET Micro Framework includes a basic port for SAM7X microcontroller. The open-source arduino-pinout-compatible FEZ Hacker is using the same processor but in this port we are detailing the port and extending its features, like PWM, Analog...etc.
See the free porting ebook for more details http://www.microframeworkprojects.com/index.php?title=Category:Beginner_Porting_Guide_ebook
When checking out, rename your folder to FEZ_Hacker and place in C:\MicroFrameworkPKv4
1\Solutions Then compile as explained in the porting ebook above.
The book and project are still in progress. Discuss it more at http://www.tinyclr.com/forum/17/