public void MakeAlert(object sender, Heater.BoiledEventArgs e)
{
Heater heater = (Heater)sender;
//访问 sender 中的公共字段
Console.WriteLine("Alarm：{0} - {1}: ", heater.Area, heater.Type);
Console.WriteLine("Alarm: 嘀嘀嘀，水已经 {0} 度了：", e.temperature);
Console.WriteLine();
}
public static void ShowMsg(Object sender, Heater.BoiledEventArgs e)
{
//静态方法
Heater heater = (Heater)sender;
Console.WriteLine("Display：{0} - {1}: ", heater.Area, heater.Type);
Console.WriteLine("Display：水快烧开了，当前温度：{0}度。", e.temperature);
Console.WriteLine();
}
