/// <summary>
 /// 定義一個對象接口，可以給這些對象動態(tài)地添加職責
 /// </summary>
 public abstract class Component
 {
  public abstract void Opration();
 }

 /// <summary>
 /// 具體對象
 /// </summary>
 public class ConcreteComponent:Component
 {

  public override void Opration()
  {
   // 具體對象的操作
  }
 }

 /// <summary>
 /// 抽象的裝飾類，它不能初始化對象。
 /// </summary>
 public abstract class Decorator:Component
 {
  protected Component component;

  /// <summary>
  /// 設置Component
  /// </summary>
  /// <param name="component"></param>
  public void SetComponent(Component component)
  {
   this.component = component;
  }

  /// <summary>
  /// 重寫Operation，實際執(zhí)行的是Component的Operation。
  /// </summary>
  public override void Opration()
  {
   if (component != null)
   {
    component.Opration();
   }
  }
 }

 public class ConcreteDecoratorA : Decorator
 {
  private void SpecialOpration()
  {
   // 本類特有的功能
  }

  public override void Opration()
  {
   //首先運行原Component的Operation(),在執(zhí)行本類的功能，相當于對原Component進行了裝飾
   base.Opration();

   this.SpecialOpration();
  }
 }

 public class ConcreteDecoratorB : Decorator
 {
  private void SpecialOprationA()
  {
   // 本類特有的功能 A
  }

  private void SpecialOprationB()
  {
   // 本類特有的功能 B
  }

  public override void Opration()
  {
   //首先運行原Component的Operation(),在執(zhí)行本類的功能，相當于對原Component進行了裝飾
   base.Opration();

   this.SpecialOprationA();
   this.SpecialOprationB();
  }
 }

 /// <summary>
 /// 裝備類，相當于Component
 /// </summary>
 public abstract class Equipment
 {

  public abstract void Attack();
 }

 /// <summary>
 /// 士兵類，繼承自Equipment
 /// </summary>
 public class Soldier : Equipment
 {
  public Soldier()
  {
   // 構造函數(shù)
  }

  /// <summary>
  /// 沒有任何武器裝備下的核心功能
  /// </summary>
  public override void Attack()
  {
   Console.WriteLine("用拳腳攻擊！");
  }
 }

 public abstract class EquipDecorator : Equipment
 {
  protected Equipment equipment;

  /// <summary>
  /// 增加裝備，使用該方法來動態(tài)地給士兵增加裝備
  /// </summary>
  /// <param name="equipment"></param>
  public void SetComponent(Equipment equipment)
  {
   this.equipment = equipment;
  }

  /// <summary>
  /// 攻擊
  /// </summary>
  public override void Attack()
  {
   //如果有裝備，就用裝備進行攻擊
   if (equipment != null)
   {
    equipment.Attack();
   }
  }
 }

 /// <summary>
 /// 步槍
 /// </summary>
 public class RifleEquipment : EquipDecorator
 {
  public override void Attack()
  {
   base.Attack();

   Console.WriteLine("步槍射擊，啪！");
  }
 }

 /// <summary>
 /// 機槍
 /// </summary>
 public class MachineGunEquipment : EquipDecorator
 {
  public override void Attack()
  {
   base.Attack();

   Console.WriteLine("機槍掃射，突突突！");
  }
 }

 /// <summary>
 /// 火箭筒
 /// </summary>
 public class RocketGunEquipment : EquipDecorator
 {
  public override void Attack()
  {
   base.Attack();

   Console.WriteLine("火箭炮射擊，唰......！");
  }
 }

 class Program
 {
  static void Main(string[] args)
  {
   // 定義新兵
   Soldier soldier = new Soldier();

   // 三種裝備
   RifleEquipment rifle = new RifleEquipment();
   MachineGunEquipment machineGun = new MachineGunEquipment();
   RocketGunEquipment rocketGun = new RocketGunEquipment();

   // 將三種裝備全部交給新兵
   rifle.SetComponent(soldier);
   machineGun.SetComponent(rifle);
   rocketGun.SetComponent(machineGun);

   // 攻擊，除了拳腳功夫外，新兵還可以使用步槍，機槍，火箭炮.最終執(zhí)行的是rocketGun.Attack().
   rocketGun.Attack();

   Console.Read();
  }
 }