Pass C# string to C++ and pass C++ result (string, char*.. whatever) to C#

Question

I tried different things but i\'m getting mad with Interop.

(here the word string is not referred to a variabile type but \"a collection of char\"): I have an unmana

Answer 1

The only good way that I know of doing this is to write a .NET C++ wrapper class using Managed C++ Extensions, and within the .NET C++ object call your native C++ code. There are functions in the managed extensions to convert a System.String to a char* or any other type of unmanaged string.

Basically you create a .NET class using C++ and expose it from an assembly, and internally to that assembly you can call your native C++ code. The other way is to add a pure C function to your C++ code using P/Invoke and then call your C code from C# and have your C function call your C++ code. This will work, but I tend to try to use managed code as much as possible.