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Composite Reuse Principle (CRP) is to use some existing objects in a new object to make it part of the new object. New objects reuse used functions by delegating to these objects. In short, it is necessary to use synthesis/aggregation as much as possible and not inheritance as much as possible.现在只能是未雨绸缪，早作准备了。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.但是哪想《铁血丹心》如此来势汹汹？。《白发魔女传》就在那里，只要眼睛没有瞎的人都会知道这是一部优秀精彩的小说。三个从外型、个性、职业、梦想、价值观到衣着品味都截然不同的三个女生，各自因为不同的理由相中同一个房子，又因为各自不同的原因互不相让，最后莫名其妙成了室友，因而展开这一段纠缠不清、好笑有趣、又难分难舍的同居生活……　这部由Emilia di Girolamo负责编剧的剧集讲述1992年的真实犯罪事件 - Rachel Nickell强奸谋杀案。当时警方认为Colin Stagg是真凶但却证据不足，而无奈之下年轻探长决定与国内一名犯罪侧写师合作，并进行一次十分大胆的卧底行动。Niamh Algar饰演卧底警员Lizzie James，她被指派接近嫌疑犯Colin Stagg并引诱对方。　　另外，现实是Colin Stagg并非真凶，凶手真身是Robert Napper，而08年时英国内政部得向Colin Stagg赔偿706000英镑。