Rather wether *NIX supports .NET There is such a project for Linux
called Mono, using GTK# for GUI stuff. Dunno how good it is yet and
which *NIX flavors except Linux have support.
http://msdn.microsoft.com/netframework/downloads/updates/default.aspx#Shared Source CLI Downloads
Shared Source CLI Downloads
Shared Source CLI 1.0 Release
The Common Language Infrastructure (CLI) is the ECMA standard that describes
the core of the .NET Framework world. The Shared Source CLI is a compressed
archive of the source code to a working implementation of the ECMA CLI and
the ECMA C# language specification. This implementation builds and runs on
Windows XP, the FreeBSD operating system, and Mac OS X 10.2. It is released
under a shared source initiative.