1 using System; 2  3 namespace Decorator 4 { 5     /// 
  6     /// 作者：bzyzhang 7     /// 时间：2016/5/21 22:56:57  8     /// 博客地址：http://www.cnblogs.com/bzyzhang/ 9     /// Beverage说明：本代码版权归bzyzhang所有，使用时必须带上bzyzhang博客地址 10     /// 
 11     public abstract class Beverage12     {13         protected string description = "Unknown Beverage";14 15         public virtual string GetDescription()16         {17             return description;18         }19 20         public abstract double Cost();21     }22 }

1 using System; 2  3 namespace Decorator 4 { 5     /// 
  6     /// 作者：bzyzhang 7     /// 时间：2016/5/21 23:02:25  8     /// 博客地址：http://www.cnblogs.com/bzyzhang/ 9     /// Espresso说明：本代码版权归bzyzhang所有，使用时必须带上bzyzhang博客地址 10     /// 
 11     public class Espresso:Beverage12     {13         public Espresso()14         {15             description = "Espresso";16         }17 18         public override double Cost()19         {20             return 1.99;21         }22     }23 }

1 using System; 2  3 namespace Decorator 4 { 5     /// 
  6     /// 作者：bzyzhang 7     /// 时间：2016/5/21 23:00:21  8     /// 博客地址：http://www.cnblogs.com/bzyzhang/ 9     /// CondimentDecorator说明：本代码版权归bzyzhang所有，使用时必须带上bzyzhang博客地址 10     /// 
 11     public abstract class CondimentDecorator:Beverage12     {13         private Beverage beverage;14 15         public CondimentDecorator(Beverage beverage)16         {17             this.beverage = beverage;18         }19 20         public override string GetDescription()21         {22             return beverage.GetDescription();23         }24 25         public override double Cost()26         {27             return beverage.Cost();28         }29     }30 }

1 using System; 2  3 namespace Decorator 4 { 5     /// 
  6     /// 作者：bzyzhang 7     /// 时间：2016/5/21 23:07:18  8     /// 博客地址：http://www.cnblogs.com/bzyzhang/ 9     /// Mocha说明：本代码版权归bzyzhang所有，使用时必须带上bzyzhang博客地址 10     /// 
 11     public class Mocha : CondimentDecorator12     {13         public Mocha(Beverage beverage)14             : base(beverage)15         { }16 17         public override string GetDescription()18         {19             return base.GetDescription() + "+ Mocha";20         }21 22         public override double Cost()23         {24             return base.Cost() + 0.20;25         }26     }27 }

1 using System; 2  3 namespace Decorator 4 { 5     /// 
  6     /// 作者：bzyzhang 7     /// 时间：2016/5/21 23:10:42  8     /// 博客地址：http://www.cnblogs.com/bzyzhang/ 9     /// Soy说明：本代码版权归bzyzhang所有，使用时必须带上bzyzhang博客地址 10     /// 
 11     public class Soy : CondimentDecorator12     {13         public Soy(Beverage beverage)14             : base(beverage)15         { }16 17         public override string GetDescription()18         {19             return base.GetDescription() + "+ Soy";20         }21 22         public override double Cost()23         {24             return base.Cost() + 0.30;25         }26     }27 }

1 using System; 2  3 namespace Decorator 4 { 5     /// 
  6     /// 作者：bzyzhang 7     /// 时间：2016/5/21 23:13:05  8     /// 博客地址：http://www.cnblogs.com/bzyzhang/ 9     /// Whip说明：本代码版权归bzyzhang所有，使用时必须带上bzyzhang博客地址 10     /// 
 11     public class Whip : CondimentDecorator12     {13         public Whip(Beverage beverage)14             : base(beverage)15         { }16 17         public override string GetDescription()18         {19             return base.GetDescription() + "+ Whip";20         }21 22         public override double Cost()23         {        24             return base.Cost() + 0.60;25         }26     }27 }

1 using System; 2  3 namespace Decorator 4 { 5     class Program 6     { 7         static void Main(string[] args) 8         { 9             Espresso beverage1 = new Espresso();10             Mocha mocha = new Mocha(beverage1);11             Soy soy = new Soy(mocha);12             Whip whip = new Whip(soy);13 14             Console.WriteLine(whip.GetDescription()+"  "+whip.Cost());15         }16     }17 }