Invaluable .net resources for landscape programming;
Clipper – An open source freeware polygon clipping library, with C#, Perl, Ruby examples.
Triangle.net – A free .net triangulation library.
Visual Studio 2013 Community Edition – free fully fledged .net development IDE including performance analysis tools.
XNA Game Studio – Although deprectated, the XNA libraries embedded in it and examples are a good starter – just don’t develop your application using Game Studio, just use the examples and binaries in standard VS.net
A Trip through the graphics pipeline – An excellent primer on the technology of graphics rendering.