一个C#编写的MDI窗体例子，实现窗体及窗体的水平和垂直平铺，层叠排列等。在Windows中，经常会遇到这种窗体的加载效果，在C#中，也是想当简单的例-An MDI form written in C# example, to achieve a form and the form' s horizontal and vertical tile, cascade arrangement and so on. In Windows, often encounter this form of