using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Runtime.InteropServices;

​

namespace demo1

{

    class Program

    {

        [DllImport("shi.dll", EntryPoint = "?HelloWorld@@YAXXZ")]

        public static extern int HelloWorld();

        public  static void Main(string[] args)

        {

            //Console.WriteLine(StringUtilities.HelloWorld());

            Console.WriteLine(HelloWorld());

            // public static extern void HelloWorld();

           //  HelloWorld();

            //  Console.ReadKey();

        }

    }

}

​

​