Passing/calling a C# function to/from a C++ dll?

Question

C++ / C#

There are dlls written in C++ and a C# project that uses this library.
What I would like to do : a dll function is called from C #, which starts the device check thread. When the device responds from the thread, the callback function is called, which calls the C# function.
Problem : pass a C# function to a C++ dll function to call later. I tried to make a dll function to pass the function to be called, with the input parameter as a function pointer, and in the initialization of this function in C #, write not a function pointer, but a delegate. I also tried, only specify the C# code as unsafe and write a function pointer instead of a delegate. Everywhere the compiler swore.
Question : how to call a C# function from a dll function in C++ or how to pass and call.

Answer 1

Try like this .