C++ DLL Port from C# -- 2

I have a working DLL written in C# that exposes several custom algorithms. I now need the exact same logic compiled into a native C++ DLL built in Visual Studio. Scope of work • Review the existing C# source code and the small test suite I will provide... (Budget: $30 - $250 USD, Jobs: C# Programming, C++ Programming, Debugging, Documentation, Visual Studio)