猫叫，老鼠逃跑，主人惊醒

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace test
{
//猫叫，老鼠逃跑，主人惊醒
class Program
{
static void Main(string[] args)
{
Cat c = new Cat("加菲猫");
Mouse m = new Mouse("米老鼠");
Person p = new Person("汤姆");

c.MyEvent += new NumberChangedEventHandler(c.OnDoSomeThing);
c.MyEvent += new NumberChangedEventHandler(m.OnDoSomeThing);
c.MyEvent += new NumberChangedEventHandler(p.OnDoSomeThing);

c.Cry();//猫叫
Console.Read();

}

}
public delegate void NumberChangedEventHandler();
public class Cat
{
public event NumberChangedEventHandler MyEvent;
private string name;
public Cat(string name)
{
this.name = name;
}

public void Cry()
{
if (MyEvent != null)
{
Delegate[] delegates = MyEvent.GetInvocationList();
foreach (Delegate del in delegates)
{
object o = del.DynamicInvoke();
}

}
}

public void OnDoSomeThing()
{
Console.WriteLine("猫" + name + "叫");
}
}

public class Mouse
{
private string name;
public Mouse(string name)
{
this.name = name;
}

public void OnDoSomeThing()
{
Console.WriteLine("老鼠" + name + "跑");
}

}

public class Person
{
private string name;
public Person(string name)
{
this.name = name;
}

public void OnDoSomeThing()
{
Console.WriteLine("主人" + name + "惊醒");
}
}
}

错误请指正