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This subject object notifies all observer objects when its state changes so that they can update themselves automatically咖啡店关门后，二阶堂打算和由奈告别。但是下一个瞬间…由奈的态度突然变了！不打算分手的由奈开始暴走，故事向不可能的方向发展。PS: Many forums have seen beginners ask whether WCF still needs to learn in depth, because they think these technologies may be outdated. Maybe Microsoft will launch a new SOA implementation scheme at that time. Wouldn't it be a waste of time to learn in depth, so they feel that there is no need to learn in depth and just know how to use them. I had the same feeling about this problem before, but now I think that although WCF technology may be replaced, the key to understanding a technology in depth is not to know some more advanced API calls, but to understand its implementation mechanism and way of thinking. Even if the latter technology is replaced, the mechanism behind it is definitely similar. Therefore, if you have a thorough understanding of a technology, you will feel familiar with the new technology and relaxed about it. In addition, after you have a thorough understanding of a technology, you dare to say that you have mastered the technology well during the interview, instead of saying that you use it a lot at ordinary times. Once you ask deeply, you do not know the implementation principle behind it. This is also why I want to write WCF series. I hope this opinion is helpful to some beginners.外卖速递员阿峰，元祖级「日光族」。一次，阿峰送外卖到共享工作空间BnW，重遇中学同学兼太子女庄嘉欣，出于自卑心作祟，阿峰刻意回避嘉欣。某夜，嘉欣醉倒，更抢去阿峰的单车，还勾起他那些年的电单车环岛梦……阿峰租住的劏房被收回，辗转迁入BnW，这里云集了KOL贤仔、大学生Yuki等不同经历的年轻人围炉取暖。嘉欣努力唤醒阿峰追梦，但阿峰躺平不愿醒，令嘉欣心碎离开。世界依然在转，阿峰可会继续原地踏步？将步入30岁杜拉拉正式成为公司代理人力资源总监，事业蒸蒸日上，杜拉拉也希望能早日跟王伟结婚。离开公司后的王伟事业发展并不顺利，他对娶杜拉拉始终下不了决心，两人感情渐亮红灯。正当王伟决定自主创业时，事业又遭遇重大挫折，他突然离开上海，不知去向。面对王伟的离去和工作上的纷纷扰扰，杜拉拉陷入绝望。正在此时王伟的同学，也是老对手陈丰横空出世，不但接替了王伟在留下的空缺，也试图添补王伟在杜拉拉心中留下的空缺。王伟并没有彻底离开，受聘于著名民企东源公司后，以一种全新的姿态出现在杜拉拉面前。王伟率领东源公司开始了收购了世界500强公司的大手笔。面对重新崛起的王伟，杜拉拉意识到自己依然爱着王伟。陈丰黯然退出。一番波折后的杜拉拉被任命为东源公司的人力资源总监，和王伟也步入了婚姻殿堂。Public class Plus extensions AbstractCalculator {爹也说白县令是好人，我才说了。