CSharp command parser example

I've added a CSharp example to the command lookup example code at http://code.google.com/p/dead-simple-command-lookups/. This, along with the C++ example, are as far as I plan to go. I (currently) don't use other langauges, and thus have no need to keep other versions readily available.

Ah, the truth comes out. I didn't really put this up for others to use (although they are certainly welcome to do so, given that the code is under the MIT license). I just wanted to have this code readily available when I needed to use it.