C#实现的窗体菜单改变窗口背景色源码实例，很简单的例子啦，点击菜单上的对应按钮，会改变窗口的背景色，不多介绍了，自己体验吧。-C# implementation of the Form menu, change the window background color source code examples, a very simple example of it, click on the corresponding button on the menu, it will change the