C# Code Minification Tools and Techniques

I am not aware of any such tool, but it would not be too hard to do some variable renaming using the built in refactor tools in Visual Studio.

For the whitespace, a regex find-replace, to replace any multiple spaces (:Wh+ in VS replace) with a single space.

I developed small lib for C# code minification CSharpMinifier based on NRefactory. Now it can remove comments, whitespaces and line breaks. Next I'am planning to add identifier minification.