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The 23 design modes, in fact, the predecessors have summed up the ways to solve the problem. Their aim is to ensure the low coupling and high cohesion of the system. The principles guiding them are nothing more than the design principles of packaging change, single responsibility, interface-oriented programming, etc. After that, I will continue to share my WCF learning process. Although there are many WCF series in the blog park, I felt that it was not necessary to write them before, and I felt that I could use them. However, I did not write them. I always felt that the knowledge was not my own and I did not feel in-depth. Therefore, I still want to write such a series. I hope all bloggers will support me more.As a module, you can introduce attributes or methods provided by other modules as needed for your own module to use.在春天后一百天, 一百万卢旺达难民在massacred 遇到由他 们的头领Hutu 带领一群士兵,并遭到屠杀,使一个非洲小国瞬间变成地狱。野 蛮是在想像力之外。联合国维和士兵是在那里观看。观看但不行动。一个英国的教士和他的年轻随从目睹这一幕，一时间他们的信念, 他们的勇气和心理极限受到极大的冲击, 最后, 他们被迫做出选择，要么留下来要么与难民一起跑。这种凶人杀起神仙来，都是等闲事。　　他越狱、抢车、私闯民宅、提刀杀人，却最终收获爱情。他憋得满脸通红，一把抓过妻子，扬手又要打她屁股。