/*********  大话设计模式上的代码 ************/

abstract class Flyweight{

    public abstract void Operation(int extrinsicstate);

}

class ConcreteFlyweight : Flyweight{

    public override void Operation(int extrinsicstate){

        Console.WriteLine("具体Flyweight : " +　extrinsicstate);

    }

}

class UnshareConcreteFlyweight : Flyweight{

    public override void Operation(int extrinsicstate){

        Console.WriteLine("不共享的具体Flyweight : " + extrinsicstate);

    }

}

class FlyweightFactory{

    private Hashtable flyweights = new Hashtable();

    public FlyweightFactory(){

        flyweights.add("X",new ConcreteFlyweight());

        flyweights.add("Y",new ConcreteFlyweight());

    }

    public Flyweight GetFlyweight(string key){

        return ((Flyweight)flyweights[key]);

    }

}