C # Learning Notes calls C + + generated DLLs

First build the Win32 project with VS2010, select the DLL and the empty project.

Header file Add.h

extern "C" __declspec (dllexport) int add (int a,int b);

Source file Add.cpp

#include "add.h" int add (int a,int b) {    return a+b;}

Compile the build Add.dll.

C # calls:

Using system;using system.runtime.interopservices;namespace consoleapplication2{    class program    {        [ DllImport ("Add.dll")] public        static extern int Add (int a, int b);        static void Main (string[] args)        {            Console.Write (Add (1, 2));            Console.read ();}}}    

Debug error, execution is not wrong.

C # Learning Notes calls C + + generated DLLs