中介者抽象类（Mediator）定义了同事对象到中介者对象的接口

namespace MediatorPattern.CLASS{    abstract class Mediator    {        public abstract void Send(string message, Colleague colleague);    }}

抽象同时类（Colleague）

namespace MediatorPattern.CLASS{    abstract class Colleague    {        protected Mediator mediator;        public Colleague(Mediator mediator)        {            this.mediator = mediator;  //获取中介者对象        }    }}

具体同事类1（ConCreateColleague1）只知道自己的行为而不知道其他同事，但认识中介者

namespace MediatorPattern.CLASS{    class ConCreateColleague1:Colleague    {        public ConCreateColleague1(Mediator mediator)            : base(mediator)        { }        public void Send(string message)        {            mediator.Send(message, this);        }        public void Notify(string message)        {            Console.WriteLine("同事1得到消息：" + message);        }    }}

具体同事类2（ConCreateColleague2）只知道自己的行为而不知道其他同事，但认识中介者

namespace MediatorPattern.CLASS{    class ConCreateColleague2:Colleague    {        public ConCreateColleague2(Mediator mediator)            : base(mediator)        { }        public void Send(string message)        {            mediator.Send(message, this);        }        public void Notify(string message)        {            Console.WriteLine("同事2得到消息：" + message);        }    }}

具体中介者类（ConCreateMediator）认识两个同事，给他们传递信息

namespace MediatorPattern.CLASS{    class ConCreateMediator:Mediator    {        private ConCreateColleague1 colleague1;        private ConCreateColleague2 colleague2;        /// 
        /// 同事对象1        /// 
        public ConCreateColleague1 Colleague1        {            set { colleague1 = value; }        }        /// 
        /// 同事对象2        /// 
        public ConCreateColleague2 Colleague2        {            set { colleague2 = value; }        }        public override void Send(string message, Colleague colleague)        {            if (colleague == colleague1)            {                colleague2.Notify(message);            }            else            {                colleague1.Notify(message);            }        }    }}

测试类（TestMain）同事1发的 Are you sure！ ，同事2发的 Yes

using MediatorPattern.CLASS;namespace MediatorPattern{    class TestMain    {        static void Main(string[] args)        {            ConCreateMediator mediator = new ConCreateMediator();            ConCreateColleague1 colleague1 = new ConCreateColleague1(mediator);            ConCreateColleague2 colleague2 = new ConCreateColleague2(mediator);            mediator.Colleague1 = colleague1;            mediator.Colleague2 = colleague2;            colleague1.Send("Are you sure ！");            colleague2.Send("Yes!");        }    }}