Cannot marshal 'return value': generic types cannot be marshaled.

See more:

C++

C#

While i am exporting a C++ code in C# using vector and list and i am getting the below error. In C++ i have used vectors and in C# i have used list to map it properly but somehow its not working.

"Error: additional information: cannot marshal 'return value': generic types cannot be marshaled."

What I have tried:

C++ code

extern __declspec(dllexport) std::vector<db> __cdecl Function()
{
   std::vector<db> result;
--
return result;
}

C# code:

public class Test
    {
        [DllImport("Test.DLL")]
        public static extern List <data> Function();

    }

void importData()
{
List<data> returnValue = Test.Function();
}