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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.科学和魔法共存的世界“雷姆南特”中有人类、獸人、动物，还有被称为“格林”的怪物。Jilin Province(2) There are more than 10 registered fire engineers, including at least 8 first-class registered fire engineers, excluding registered fire engineers to be transferred to branches to practice and registered fire engineers to established branches.黄豆急忙道：爷爷，这个……在京城吧，就是说，朝廷当官的吵架跟咱乡下不一样，不是这么干的……郑长河嘴一撇，哼了一声道：晓得。沉默寡言的小说家丹尼尔·曼托瓦尼（奥斯卡·马丁内兹饰）与成功有着一种说不清、道不明的关系：成功给他带来了同时代的其他作家难以企及的财富，却让他担忧自己已经没有成名前那宝贵的棱角。　　Prinoot从没想过他会成为仇恨的一部分。尽管他的父亲是Sirimontra的女婿，但他的母亲只是一个被遗弃在美国的情妇。他从小就不知道有父亲是什么样子。