public class Car
{ //一个委托public delegate void Exploded(string msg);//公共的，没有辅助方法public Exploded explodedList;//触发分解的通知public void Accelerate(int delta){if(explodedList!=null)explodedList("Sorry,this car is dead..");}
}

class Program
{static void Main(string[] args){Console.WriteLine("Agh No Encapsulation!");//创建一个CarCar myCar=new Car();//我们可以直接访问委托myCar.explodedList=new Car.Exploded(CallWhenExploded);myCar.acclerate(10);//现在可以赋值一个全新对象myCar.explodedList=new Car.Exploded(CallHereToo);myCar.acclerate(10);//调用者还可以直接调用委托myCar.explodedList.Invoke("hee,hee,hee");}static void CallWhenExploded(string msg){Console.WrtieLine(msg);}static void CallHereToo(string msg){Console.WrtieLine(msg);}
}

public calss Car
{//这个委托用来与Car的事件协作public delegate void CarEventHandler(string msg);//定义每个委托类型的成员变量public event CarEventHandler Exploded;public event CarEventHandler AboutToBlow;...
}

public void Accelerate(int delta)
{//如果汽车不能用了，触发引爆事件if(carIsDead){if(Exploded!=null){Exploded("sorry,this card is dead...");}}else{currSpeed+=delta;//已经不能用了吗？if(10==maxSpeed-currSpeed&&AboutToBlow!-null_{AboutToBlow("Careful boddy! Gonna blow!");}//还好着呢if(currSpeed>=maxSpeed)carIsDead=true;elseConsole.WriteLine("CurrSpeed={0}",currSpeed);}
}

class Program
{static void main(string[] args){Console.Write("####Delegates as events ####\n");Car cl=new Car("SlugBug",100,10);//注册事件处理程序cl.OnAboutToBlow +=new Car.CarEventHandler(CarIsAlmostDoomed);cl.OnAboutToBlow +=new Car.CarEventHandler(CarAboutToBlow);cl.CarEventHandler d=new Car.CarEventHandler(CarExploded);c1.Exploded +=d;Console.WriteLine("Speed up");for(int i=0;i<7;i++)cl.Accelerate(20);//从调用列表中移除CarExploded方法c1.Exploded -=d;Console.WriteLine("Speed up");for(int i=0;i<7;i++)cl.Accelerate(20);Console.ReadLine();}public static void CarAboutToBlow(string msg){ Console.WriteLine(msg);}public static void CarIsAlmostDoomed(string msg){ Console.WriteLine(msg);}public static void CarExploded(stirng msg){ Console.WriteLine(msg);}
}