研究.NET平台上B/S系统的分层架构方法和设计模式的应用。完成一个完整的BBS系统，以实践检验理论。-The Research of Multi-Layer Architecture and Design Pattern Based on .NET Platform！ In traditional system design, database access, business logic and visual elements are usually combined together.

一个简单的论坛，我的毕业设计 开发的时候用的是SQL2005+VS2005，后来换成VS2008了 common层封装了。-A simple forum for my graduation design and development time are used in SQL2005+ VS2005, the VS2008 later replaced by a common layer package.