public static void ShowMsg(Object sender, Heater.HeatEventArgs e) //静态方法
{
Heater heater = (Heater)sender;
Console.WriteLine("{0} - {1}: ", heater.area, heater.type);
Console.WriteLine("管道超温了，当前温度：{0}度。", e.temperature);
Console.WriteLine();
}
public void MakeAlert(Object sender, Heater.HeatEventArgs e)
{
Heater heater = (Heater)sender;
//访问 sender 中的公共字段
Console.WriteLine("{0} - {1}: ", heater.area, heater.type);
int a = 0X7FF; //发生频率(Hz)
int b = 1000; //持续时间(毫秒)
Beep(a, b);
Console.WriteLine("管道已经 {0} 度了：", e.temperature);
Console.WriteLine();
}