四人帮写的例子。用于网站权限管理。使用membership，role，users。相当于ASP.NET配置，不同的是容易移植，代码简洁有效。代码为C#.-Gang of Four was an example. Rights management for the site. To use membership, role, users. Equivalent to ASP.NET configuration, different is easy to transplantation, the c