.NET平台上的分层架构（很多朋友称其为“三层架构”），似乎是一个长盛不衰的话题。经常看到许多朋友对其进行分析、探讨、辩论甚至是抨击。笔者在仔细阅读了大量这方面文章后，认为许多朋友在分层架构的理解上存在两个比较大的偏颇：-. NET platform, layered architecture (many of my friends called " three-tier" ), seems to be an enduring topic. Often see many friends analyze, discuss, debate and even criticism. I read a lot in this article, that many friends in the layered architecture of understanding the existence of two relatively large biased: