This Djohn Rihter book for programming windows aplication.-This is Djohn Rihter book for programming windows aplication.

设计原则：开闭原则，里氏替换，依赖倒转 ，单一原则 -Design principles: open and close the principle Richter replacement dependent Rewind

本文应用“开－闭原则”、“依赖倒转”、“里氏代换”等编程模式和原则，构造了便于扩充数据库类型的系统架构，给出了通过配置参数转换数据库类型的方法。并对其可扩充性、易用性、代码复用进行了讨论。-In this paper, open- closed principle and reverse dependency , Richter substitution and other programming model and principles constructed to facilita

Richter J_ - CLR via C# 4.5 Ru