static void Main(string[] args)
{
#region 基本用法（Basic.cs）
ConcreteSubject s = new ConcreteSubject();
s.Attach(new ConcreteObserver(s, "X"));
s.Attach(new ConcreteObserver(s, "Y"));
s.Attach(new ConcreteObserver(s, "Z"));
s.SubjectState = "ABC";
s.Notify();
#endregion
#region 具体实例（Example.cs）
//相比于基本用法，这个实例：
//①进一步将通知者和观察者分离，运用依赖倒转原则，在客户端中将观察者动作委托给通知者，进一步降低了耦合
//②观察者实例无需继承观察者接口
Boss huhanshan = new Boss();
StockObserver tongshi1 = new StockObserver("魏关姹", huhanshan);
NBAOberver tongshi2 = new NBAOberver("易管查", huhanshan);
huhanshan.Update += new EventHandler(tongshi1.CloseStockMarket);
huhanshan.Update += new EventHandler(tongshi2.CloseNBADirectSeeding);
huhanshan.SubjectState = "我胡汉三回来了";
huhanshan.Notify();
Console.Read();
#endregion
}
