using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ConsoleApplication17

{

    public delegate string testDelegate(string a, int b);

    class Program

    {

        static void Main(string[] args)

        {

            //1 C# 1 最原始的委托赋值

            testDelegate t1 = new testDelegate(M);

            //2 C# 2 委托赋值

            testDelegate t2 = delegate (string a, int b)

            {

                Console.WriteLine(a + b.ToString());

                return a + b.ToString();

            };

            //3 C# 3 委托赋值（a，b值类型对应委托声明的类型）

            testDelegate t3 = (a, b) =>

            {

                Console.WriteLine(a + b.ToString());

                return a + b.ToString();

            };

            // 调用委托实例

            t1.Invoke("测试1", );

            t2.Invoke("测试2", );

            t3.Invoke("测试3", );

        }

        static string M(string a, int b)

        {

            Console.WriteLine(a + b.ToString());

            return a + b.ToString();

        }

    }

}