C# library to native C++ application

Question

I know I can use dll import + wrapping (managed) to use C++ libraries in C# applications ( question link>> ) but what's opposite? How can I use C# library in my C++ application? I'll handle events/operations/results in C# library but my application created with C++. For example here is my C++ application:

//In this example; Manager will be my C# library's instance, Log is a C# library's function that can print something. (That's only an example, not works. For describing something to understand my question)

int main()
{
   if(MySystem.Start() == 0) //If there is no error
   {
      Manager.Log("System started successfully!"); //Post it to C# library!
   }
   return 0;
}

EDIT: Solution should be native C++. I'll not use C++\\CLI!

EDIT: Only c++ application will be native. Namely I can create a shared c++ library to handle C# library. C++ App.(Event) >> C++\\CLI Lib. >> C# Library , this way is posibble. Is there any example/topic/start point?

>> MY SOLUTION ( After answers, should be helpful for others ): I'll create a C++\\CLI shared library and I'll use it with my native C++ app. This library will handle my C# library ( more about in this question>> ). If I don't need C#, I'll re-code my C++\\CLI library as native library. I think that is pretty useful.

Answer 1

No CLI?

You can do it using Reverse P/Invoke

See http://tigerang.blogspot.co.il/2008/09/reverse-pinvoke.html .

Answer 2

CoreRT allows to compile native libraries for windows, linux and osx x64 platform this avoid to you use an C++ compatible layer. CoreRT uses NetCore, and NetCore doesn't support C++/CLI.

https://dev.to/encrypt0r/writing-native-libraries-in-c-3kl

Answer 3

You will have to take care to expose your interface from the C# library to a C++-compatible layer.

Out of the top of my head, you could do two things:

• Create a C API on top of your C# library (best way would be to add a C++/CLI layer to your library).

• Create a COM interface to your C# library and use the library through COM objects.