设计模式之 外观模式

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace Ahoo.Demo.DesignPatterns.Facade{    /* ####### 外观模式 #######     * 为子系统的一组接口提供一直的入口     * 该模式定义的高层接口，使子系统更加容易使用    */    public class SystemOne    {        public void DoMethodOne()        {         }    }    public class SystemTwo    {        public void DoMethodTwo()        {        }    }    /// <summary>    /// 外观模式    /// </summary>    public class Facade    {        private SystemOne sysOne;        private SystemTwo sysTwo;        public Facade()        {            sysOne = new SystemOne();            sysTwo = new SystemTwo();        }        public void Do()        {            sysOne.DoMethodOne();            sysTwo.DoMethodTwo();        }    }    public class Client    {        public static void Excute()        {            Facade facade = new Facade();            facade.Do();        }    }}