/// <summary>第二个异步调用的按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnyb2_Click(object sender, EventArgs e)
{
this.tbYB2.AppendText("老刘想洗澡了...\r\n");
Heater heater = new Heater();
heater.SetTemp = 85;
LaoLiu laoliu = new LaoLiu(heater);
this.tbYB2.AppendText("老刘开始烧水...\r\n");
//老刘打开热水器，然后去看电视了
laoliu.OpenHeater(ActionCallBack);
this.tbYB2.AppendText(laoliu.WatchTv());
this.tbYB2.AppendText(laoliu.ListenToSong());
}
