使用C#为microsoft .net 框架编写窗口模式的应用程序， 适合学习练习-This article is a very simple introduction on writing a Windows Form application for the Microsoft.NET fr a mework using C#. The sample application demonstrates how to create and layout controls on a simple form and the handling of mouse click events. The application displays a form showing attributes of a file. This form is similar to the properties dialog box of a file (Right click on a file and Click on Properties menu item). Since attributes of a file will be shown, the sample will show how to use File IO operations in .NET fr a mework.