桥接模式（Bridge Pattern）

      桥接模式是一种结构型模式(structural pattern)用于解决系统设计中两个或多个维度的变化，从而实现各自维度的独立扩展，而不影响到使用客户
下面用一个坦克游戏的示例演示了桥接模式的使用场景（这款游戏前期准备在window、linux上运营，以后可能会在手机、苹果机等等运行）
示例中的类型与结构图中的对应关系
TankGameApp = Client
Tank = Abstraction
Tank70(Tank90) = RefinedAbstraction
Platform = Implementor
NTPlatform = ConcreteImplementorA
LinuxPlatform = ConcreteImplementorB

    public class TankGameApp
    {
        public static void Main()
        {
            //如果在NT平台下使用该游戏
            NTPlatform ntPlatform = new NTPlatform();
            Tank nTank = new Tank70(ntPlatform);
            nTank.Move();
            nTank.Shot();
            nTank.Stop();

            //如果在NT平台下使用该游戏
            LinuxPlatform linuxPlatform = new LinuxPlatform();
            Tank lTank = new Tank90(linuxPlatform);
            lTank.Move();
            lTank.Shot();
            lTank.Stop();

            Console.ReadLine();
        }
    }

    public abstract class Tank
    {
        public abstract void Draw();
        public abstract void Move();
        public abstract void Stop();

        //shot方法不涉及调用系统接口
        public abstract void Shot();
    }

    public class Tank70 : Tank
    {
        Platform platform;

        public Tank70(Platform platform)
        {
            this.platform = platform;
        }

        public override void Draw()
        {
            platform.Draw();
        }

        public override void Move()
        {
            platform.Move();
        }

        public override void Stop()
        {
            platform.Stop();
        }

        public override void Shot()
        {
            Console.WriteLine("Tank70开火！");
        }
    }

    public class Tank90 : Tank
    {
        Platform platform;

        public Tank90(Platform platform)
        {
            this.platform = platform;
        }

        public override void Draw()
        {
            platform.Draw();
        }

        public override void Move()
        {
            platform.Move();
        }

        public override void Stop()
        {
            platform.Stop();
        }

        public override void Shot()
        {
            Console.WriteLine("Tank90开火！");
        }
    }

    #region 游戏运行平台
    public abstract class Platform
    {
        public abstract void Draw();
        public abstract void Move();        
        public abstract void Stop();
    }

    public class NTPlatform : Platform
    {
        public override void Draw()
        {
            //调用windows接口绘制坦克外形，等等……
            Console.WriteLine("windows平台下绘制坦克外形。");
        }

        public override void Move()
        {
            Console.WriteLine("windows平台下坦克移动。");
        }

        public override void Stop()
        {
            Console.WriteLine("windows平台下坦克停止。");
        }
    }

    public class LinuxPlatform : Platform
    {
        public override void Draw()
        {
            //调用Linux接口绘制坦克外形，等等……
            Console.WriteLine("Linux平台下绘制坦克外形。");
        }

        public override void Move()
        {
            Console.WriteLine("Linux平台下坦克移动。");
        }

        public override void Stop()
        {
            Console.WriteLine("Linux平台下坦克停止。");
        }
    }
    #endregion

      这篇文章 中的毛笔+颜料的例子更形象的展现了桥接模式的用法。