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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forums have seen beginners ask whether WCF still needs to learn in depth, because they think these technologies may be outdated.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.三月二十三日，玄武王祖父停灵四十九日后，葬入张家祖坟。一部关于智能手机时代爱情的合奏喜剧。泰国8台魔幻题材泰剧《#猛虎下山#》人物海报出来啦！7月2号，猛虎之魂即将重生！　旧上海滩，十里洋场的繁华掩盖不了背后你死我活的江湖厮杀。章邯沉声道：章邯终究是个背信弃义之人，是大秦的罪人啊。