//烧水器(被观察者)

    public class Heater

    {

        private int temperature;

        private string Place = "上海宝山";

        private string Time = "2013年11月7号";



        public delegate void BoiledEventHandler(object sender,BoiledEventArgs e);

        public event BoiledEventHandler Boiled;



        //定义BoiledEventArgs类，传递给Observer所感兴趣的信息

        public class BoiledEventArgs : EventArgs

        {

            public readonly int temperature;

            public readonly string Place;

            public readonly string Time;



            //构造函数

            public BoiledEventArgs(int temperature,string Place,string Time)

            {

                this.temperature = temperature;

                this.Place = Place;

                this.Time = Time;

            }

        }



        //可以供继承自 Heater 的类重写，以便继承类拒绝其他对象对它的监视

        protected virtual void OnBoiled(BoiledEventArgs e)

        {

            if (Boiled != null)

            { // 如果有对象注册

                Boiled(this, e);  // 调用所有注册对象的方法

            }

        }



        //烧水

        public void BoilWater()

        {

            for (int i = 0; i <= 100; i++)

            {

                temperature = i;



                if (temperature > 95)

                {

   &nb