C# port API refactoring (Renaming)

[ros-olshevskyi]

If PR #24 makes sense, I would like to continue and make a refactoring of C# API.

First of all it would be great to do something like grand renaming and change all names of methods and classes to C# standardized style: e.g. diff_main -> DiffMain with appropriate method documentation features, because for now it looks like a direct port from Java.

Does it make sense?