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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forums have seen beginners ask whether WCF still needs to learn in depth, because they think these technologies may be outdated.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.I have a friend who used to be a stay-at-home mother. She couldn't stand a quarrelling marriage all day long and chose to divorce.杨长帆摊臂道，就像你们将香料运到澎湖，由我们代理东海一样，我们也会运到马六甲或者什么地方，由你们代理西洋，价格与你们一样，不占便宜。1板栗大声应下，躬身摆了个架势，等着他过来。The cabinet with the key is empty. Open the cabinet door and put in the articles. Then put in enough coins. Turn the key lock and pull out the key. The cabinet is locked. The usage method is basically the same as that of the lockers in domestic supermarkets.必须定期向成为使魔的威尔梅提供魔力，那个方法是进行浓厚的接吻。