Return string from c++ dll export function called from c#

Question

I am trying to return a string from a c++ dll export function. I am calling this function from c#. I have seen a lot of examples on the internet and I am really confused what to

Answer 1

The .NET runtime uses unicode (wchar_t) strings, not ascii (char) so this require some changes. You should also consider that .NET has no way to free a string that has been allocated by a C/C++ application, so having the buffer pre-allocated and passed in from C# is the only safe way to manage this without memory leaks or worse.