简单多播委托Demo

 namespace ConsoleApp4
 {
     class Program
     {
         static void Main(string[] args)
         {
             Mum mum = new Mum();
             Dad dad = new Dad();
             Son son = new Son();
             Sister sister = new Sister();
             mum.TellEat();
             mum.EatDel += son.SonEat;
             mum.EatDel += dad.DadEat;
             mum.EatDel += sister.SisterEat;
             mum.EatDel();
             //最后执行这个委托即可
             Console.ReadKey();
         }
     }
     //定义一个无参无返的委托
     public delegate void HaveEatDel();
     public class Mum
     {
         public void TellEat()
         {
             Console.WriteLine("吃饭了");
         }
         //定义委托实例
         public HaveEatDel EatDel { get; set; }
     }
     public class Son
     {
         public void SonEat()
         {
             Console.WriteLine("知道了，玩完游戏再去");
         }
     }
     public class Dad
     {
         public void DadEat()
         {
             Console.WriteLine("就来！");
         }
     }
     public class Sister
     {
         public void SisterEat()
         {
             Console.WriteLine("一会就来");
         }
     }
 }