C#设计模式：外观模式（Facade Pattern）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _10.外观模式
{
    class Program
    {
        static void Main(string[] args)
        {
            //不存在外观类是我们的调用方法是这样的,如下代码;
            //People p = new People("中国人");
            //Event e = new Event();
            //Console.Write(p.people);
            //e.Say();


            //外观系统，跟以上代码比较，我们可以知道：外观模式提供了一个统一的接口，用来访问子系统中的一群接口。而不用实例过多，同时也降低了客户端和子系统之间的紧耦合，如People和Event的实例都不在Program中了
            Facade fa = new Facade("中国人");
            fa.WhoEvent();

            Facade fa1 = new Facade("美国人");
            fa1.WhoEvent();
            Console.Read();
        }
    }
    /// 

    /// 外观类
    /// 
    public class Facade
    {
        private Event ev { get; set; }
        private People pe { get; set; }

        public Facade(string people) 
        {
            ev = new Event();
            pe = new People(people);
        }
        public void WhoEvent() 
        {
            Console.Write(pe.people);
            ev.Say();
            ev.Eat();
        }
    }
     /// 

     /// 相当于行为子系统
     /// 
    public class Event
    {
        public void Say()
        {
            Console.Write("说话和");
        }
        public void Eat()
        {
            Console.WriteLine("吃饭");
        }
    }
    /// 

    /// 相当于人子系统
    /// 
    public class People
    {
        public string people { get; set; }
        public People(string p)
        {
            this.people = p;
        }
    }
}