一个无标题栏，无关闭按钮，无状态栏的窗口，但是可以拖动，关闭时候请按Alt+F4，窗口的长宽比在一开始时是受限制的，不能被变小，只允许被拉大，去掉窗口的标题栏和关闭按钮等小技巧，也是值得参考的，献给C#初学者的代码。-A no title bar, no close button, without the status bar of the window, but you can drag off time, press Alt+ F4, the aspect ratio of the window at the outset is restricted and can not be smaller and may only be widening, remove the window s title bar and close buttons and other small tips, but also worth considering, dedicated to beginners C# code.