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After creating some subclasses of Pizza, you can start testing:The works, community topics, user comments, content or pictures uploaded by users included in this site are all personal behaviors of users. If the above content infringes your rights and interests, welcome to report the complaint. Once verified, it will be deleted immediately and this site will not assume any responsibility.意大利电影《完美陌生人》的德国翻拍版。好似他把秦淼分成了两个人，在眉山的这四年，秦淼是属于他的，是他黎章的弟弟。千金小姐关关不计回报的帮助学长韩山创业，收获美好爱情。Dogs go and do singing and stuff. EMPOWERING.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.