CPP DLL to C#

[TOMERP]

hello
i wrote a dll using C++ two years ego.
i used external headers like this:
in "MAIN.cpp" i called external header & wrote the following line:
#include "ABCD.h"
now i need to write it in C#.
need to know if & how to do it in C#.

[Pirate]

First , no header files in C# . So , try rewriting the code in C# .