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Soon I saw Li Jianzhong's C # Object-Oriented Design Pattern Lecture on MSDN's Webcast. A very good series of lectures gave me a new understanding of design patterns. I realized that learning design patterns, specifically learning object-oriented design patterns, should start with learning object-oriented. "The principle of object-oriented is like understanding the rules of chess, and the design pattern is equivalent to a mess. I don't know what the rules look at." Since I have been doing ASP.NET development for the previous year, although I have been writing classes, learning Duwamish to make hierarchical architecture, typed DataSet and custom entity classes, it seems that I haven't used interfaces much in the past year, and I seldom use any polymorphism. In fact, the understanding of object-oriented programming is still very vague.Having a source of heat;　　3×04《Brothers》：Ramse和Cole鼓起勇气前往2007年——他们知道这要么是个陷阱，要么是杀死「见证者」的最后机会。但是当Cole发现一个令人心碎的真相之后，他意识到此次任务两者兼具。至于那房间住的是谁，大家倒是知道，当下各自有了揣摩。他突然明白过来，赢诗曼在尉缭耳边说了什么，看来赢子夜适才被问到了和自己相同的问题。