最快的方法是在处理程序中启动一个Timer，该计时器检测第一个窗体何时关闭.设置间隔为五秒，然后在计时器的滴答处理程序中，停止/处置计时器，然后启动第二个表格.

The fastest way is to start a Timer in the handler that detects when the 1st form has been closed. Set the interval for five seconds, and in the tick handler for the timer, stop/dispose the timer, and start the 2nd form.