全书分为四个部分,首先介绍了CSharp语言和面向对象程序设计的一般原则，然后分别讲述了创建型模式、结构型模式和行为型模式。-Book is divided into four parts, first of all introduced the CSharp object-oriented programming language and the general principles of design, and then describes the creation of the respective model, structure model and behavior model.