设计模式-装饰模式

///需要添加新功能的对像
public class Car
    {
        private string name;
        public string Name
        {
            get { return name; }
            set { name = value; }
        }
        
        public Car()
        {
        }
        public Car(string cName)
        {
            this.name = cName;
        }

        //其余属性略
        public virtual void CarDescription()
        {
            Console.WriteLine("  装饰的汽车“{0}”。", name);
        }
    }
　　 //被装饰对象的子类，包含添加装饰对象,和执行装饰对象方法的两个函数
    public abstract class DecoratorCar:Car
    {
        protected Car car;
        public void Decorator(Car dcar)
        {
           car = dcar;
        }

        public override void CarDescription()
        {
            if (car != null)
                car.CarDescription();
        }
    }
　　 
    //GPSCar 被装饰对象的子子类，需要添加的装饰对象（带有gps功能的汽车）
    public class GPSCar : DecoratorCar
    {
        string gStr = "先进的GPS系统 ";
        public override void CarDescription()
        {
            Console.Write(gStr);
            base.CarDescription();
        }
    }

    //TransmitterCar 
    public class TransmitterCar : DecoratorCar
    {
        string tStr = "卫星对讲机系统 ";
        public override void CarDescription()
        {
            Console.Write(tStr);
            base.CarDescription();
        }
    }

    //Movies 
    public class MoviesCar : DecoratorCar
    {
        string mStr = "先进的影视系统 ";
        public override void CarDescription()
        {
            Console.Write(mStr);
            base.CarDescription();
        }
    }   

 static void Main(string[] args)
        {
            Car car = new Car("奔驰520");

            GPSCar gCar = new GPSCar();
            TransmitterCar tCar = new TransmitterCar();
            MoviesCar mCar = new MoviesCar();

            gCar.Decorator(car);
            tCar.Decorator(gCar);
            mCar.Decorator(tCar);

            mCar.CarDescription();

            Console.ReadLine();
        }