因为窗体是类，所以可以使用继承性在现有窗体的基础上定义新窗体。

Because forms are classes, you can use inheritance to define new forms based on existing forms.

youdao

如果你正在使用Visual Studio . NET工具箱，无论是Windows窗体设计器还是组件类设计器你都可以安全的使用这个类。

If you're using the Visual Studio.net toolbox, you can safely use this timer with either the Windows Forms designer or the component class designer.

youdao