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Above, by registering one or more delegate instances for the event with + =, in fact, you can also directly register methods for the event.还得有一段日子。刘邦的催促倒还是其次，他更为在乎的还是荥阳那边能够撑多久，刘邦现在出了什么闪失，对自己没有任何好处，诸多谋划也会前功尽弃。讲述了生活在距今200年以后的未来女孩艾晴为了验证时光穿梭技术，多次回到了两千年以前的世界，并与龟兹国皇族罗什展开了一段奇遇，艾晴为验证历史做了试验小白鼠，几次三番被推进时空穿越机，遇见了千古有名的高僧鸠摩罗什，两人命中有着注定的牵绊，上演了一段穿越千年荡气回肠的恋歌。但每天晚上，他都会到季木霖的门前索要一个晚安吻，规则和白天的道别吻差不多，然后他才会开心地回房睡觉，当然有时他也会凭着这个吻回去做些更舒服的事情。The fundamental reason for using design patterns is to adapt to changes, improve code reuse rate, and make software more maintainable and scalable. In addition, the following principles should be followed when designing: single responsibility principle, open and closed principle, Richter substitution principle, dependency inversion principle, interface isolation principle, composite reuse principle and Dimit principle. Each design principle is described below.Oxygen-free copper