/// <summary>
  /// 抽象概念中的遥控器，扮演抽象化角色
  /// </summary>
  public class RemoteControl
  {
    // 字段
    private TV implementor;
    // 属性
    public TV Implementor
    {
      get { return implementor; }
      set { implementor = value; }
    }
    /// <summary>
    /// 开电视机，这里抽象类中不再提供实现了，而是调用实现类中的实现
    /// </summary>
    public virtual void On()
    {
      implementor.On();
    }
    /// <summary>
    /// 关电视机
    /// </summary>
    public virtual void Off()
    {
      implementor.Off();
    }
    /// <summary>
    /// 换频道
    /// </summary>
    public virtual void SetChannel()
    {
      implementor.tuneChannel();
    }
  }
  /// <summary>
  /// 具体遥控器
  /// </summary>
  public class ConcreteRemote : RemoteControl
  {
    public override void SetChannel()
    {
      Console.WriteLine("---------------------");
      base.SetChannel();
      Console.WriteLine("---------------------");
    }
  }

/// <summary>
  /// 电视机，提供抽象方法
  /// </summary>
  public abstract class TV
  {
    public abstract void On();
    public abstract void Off();
    public abstract void tuneChannel();
  }
  /// <summary>
  /// 长虹牌电视机，重写基类的抽象方法
  /// 提供具体的实现
  /// </summary>
  public class ChangHong : TV
  {
    public override void On()
    {
      Console.WriteLine("长虹牌电视机已经打开了");
    }
    public override void Off()
    {
      Console.WriteLine("长虹牌电视机已经关掉了");
    }
    public override void tuneChannel()
    {
      Console.WriteLine("长虹牌电视机换频道");
    }
  }
  /// <summary>
  /// 三星牌电视机，重写基类的抽象方法
  /// </summary>
  public class Samsung : TV
  {
    public override void On()
    {
      Console.WriteLine("三星牌电视机已经打开了");
    }
    public override void Off()
    {
      Console.WriteLine("三星牌电视机已经关掉了");
    }
    public override void tuneChannel()
    {
      Console.WriteLine("三星牌电视机换频道");
    }
  }

/// <summary>
  /// 以电视机遥控器的例子来演示桥接模式
  /// </summary>
  class Client
  {
    static void Main(string[] args)
    {
      // 创建一个遥控器
      RemoteControl remoteControl = new ConcreteRemote();
      // 长虹电视机
      remoteControl.Implementor = new ChangHong();
      remoteControl.On();
      remoteControl.SetChannel();
      remoteControl.Off();
      Console.WriteLine();
      // 三星牌电视机
      remoteControl.Implementor = new Samsung();
      remoteControl.On();
      remoteControl.SetChannel();
      remoteControl.Off();
      Console.Read();
    }
  }

public abstract class Car
  {
    public IEngine _engine;

    public Car(IEngine engine)
    {
      _engine = engine;
    }

    public virtual void Start()
    {
      _engine.Start();
    }

    public virtual void Stop()
    {
      _engine.Stop();
    }
  }

public class Bus : Car
  {
    public Bus(IEngine engine)
      : base(engine)
    {
    }

    public override void Start()
    {
      base.Start();
      Console.WriteLine("Bus Start");
    }

    public override void Stop()
    {
      base.Stop();
      Console.WriteLine("Bus Stop");
    }
  }

  public class Limousine : Car
  {
    public Limousine(IEngine engine)
      : base(engine)
    {
    }

    public override void Start()
    {
      base.Start();
      Console.WriteLine("Limousine Start");
    }

    public override void Stop()
    {
      base.Stop();
      Console.WriteLine("Limousine Stop");
    }
  }

public interface IEngine
   {
     void Start();
     void Stop();
   }

public class GasEngine : IEngine
  {
    public void Start()
    {
      Console.WriteLine("Gas Engine Start");
    }

    public void Stop()
    {
      Console.WriteLine("Gas Engine Stop");
    }
  }

  public class DieselEngine : IEngine
  {
    public void Start()
    {
      Console.WriteLine("Diesel Engine Start");
    }

    public void Stop()
    {
      Console.WriteLine("Diesel Engine Stop");
    }
  }