Not sure why there is a desire to mix these two, ahk and .net.
There's already a free open source tool for developing in .net called sharp develop.
http://www.icsharpcode.net/OpenSource/SD/
From here .net developers can build any exe they want. The key to extensibility would be if AHK could run an exe file created in sharp develop, thereby providing the best of both worlds for those who want to go that route.
As a sidebar there's also a prototype tool called Nscript for processing C#, vb.net and J# files
http://www.codeproject.com/dotnet/nscript.asp________
Homemade vaporizers