static void Main(string[] args)
{
ConcreteMediator mediator = new ConcreteMediator();
ColleaguaA colleaguaA = new ColleaguaA(mediator);
ColleaguaB colleaguaB = new ColleaguaB(mediator);
mediator.ColleaguaA = colleaguaA;
mediator.ColleaguaB = colleaguaB;
colleaguaA.Notify("一起玩游戏啊！");
colleaguaB.Notify("不了，我还要学习。");
}