C++ WinHTTP Dll to be used in C#

I want DLL for the C++ WinHTTP Wrapper class, WinHttpClient.h, [login to view URL] that can be used in C# Application, the WinHttpClient.h is the above projects header file, I want to use it in a C# project. 1) WinHttpClient.h All Functions 3) Managed Code that can be used & referenced in .Net Applications. 3) Dll With Source Code If you have a better library for HTTP, a ready made solution is welcome, it should include 1) C++ CLI project, Not .Net 2) Get Post Requests. 3) Proxy Support 4) Raw Response including Headers 5) HTTPS 6) Fast & Efficient. Please send me a demo, in case of ready made solution is available. Not much work for experienced developers, but that's all it is.