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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.　　明朝科举乡试开考在即，当朝尚书曹萱奉旨到各地征选镇国之宝回到老家，借为国征宝之机，大肆中饱私囊，各地官吏敢怒不敢言。与此同时，曹萱以权谋私，买通刘主考官，使其子曹宝在乡试中高中新科解元，众人为之哗然。素有“神童”之誉“奇才”之称的解缙愤怒地撕下榜文，冒着生命危险，与刘主考当众辩卷，并以其聪慧的幽默和超人的机敏，辩得刘主考哑口无言。历经千难万险，解缙辩卷Under the "Learning Book" section, In addition to the relevant books concerning General Secretary Xi Jinping, they also include the Complete Works of Marx and Engels (82), the Collected Works of Marx and Engels (11), the Selected Works of Marx and Engels (4), the Complete Works of Lenin (60), the Selected Works of Lenin (4), the Selected Works of Lenin (5), the Selected Works of Mao Zedong (4), the Collected Works of Mao Zedong (8), the Selected Works of Deng Xiaoping (3), the Selected Works of Jiang Zemin (3) and the Selected Works of Hu Jintao (3). These books are all PDF versions, although catalogue reference and text retrieval are not yet available, which has provided great convenience for ordinary learners.但愿有机会小葱道：也不是天天帮，不过是忙的时候帮一把。一部关于智能手机时代爱情的合奏喜剧。