Re: Quake II Full Build all setup for .NET
 

"I suspect that the HL engine is in C, not C++. I think only the mod code is in C++."
Yes, that may be correct, at least the HL engine isn't FULLY object oriented.
You can check out the botman's forum archive and you'll find some HL engine code snippet, and there's still some Quake1 functions like "VectorMA", "VectorAdd" and not just "a+b" in it.

Re: Quake II Full Build all setup for .NET
 

for people who is interested:
there is a C++ version of Quake2 (it uses some classes, but still not that Object-oriented like HLSDK) available at:

http://www.planetquake.com/q2oop/