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The following columns are those in books. For example, the columns on Taobao or Tmall are not realized in this way, and it doesn't matter. We can change them. We mainly learn the idea of using the intermediary mode to realize them.4. Iterator modePS: 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forums have seen beginners ask whether WCF still needs to learn in depth, because they think these technologies may be outdated.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.There is still one Lone Star in Dreadwind, which seems to be a simple and crude final damage +50%离开会议室，陈启还隐隐听到，有人说他明明可以轻松赚钱，却把钱都浪费在那不知所谓的福利上。富家俊少李睿与率真美女康优雅的婚礼盛大而豪华，婚礼进行中，优雅却无意发现姐姐康悠然与李睿的私情，突如其来的打击，令优雅悲愤地逃离了婚礼现场……年轻的整形外科医生谢阳在显贵芸集的婚礼上推介自己，结果一无所获。令他欣喜的是妻子包丽娜怀孕并生下女儿谢小晴。但不久，包丽娜就为了自己的事业弃谢阳父女出国深造去了……绝望的优雅离家出走。独居上海与优雅的父亲断绝兄弟关系的满叔叔收留了优雅。一场离奇的车祸使优雅索性宣告“意外身亡”。噩耗传来，李睿悲伤不已，悠然在父母眼中成了害死妹妹的“元凶”，悠然带着内疚去了大洋彼岸……优雅意想不到的是自己怀孕了，而且由于身体原因不能做流产手术。优雅被迫接受了这样的现实，当儿子康皓降世后，她似乎看到了新的生机和希望……七年后，悠然归国。在优雅的墓碑前与李睿不期而遇，一直深爱李睿的悠然终于如愿以偿了。当她走进李睿的生活中才发现，优雅的影子无处不在，她不过是优雅的替代品而已。在李睿心里，优雅依然如故，因为优雅是唯一弃他而去的姑娘……七年中，优雅帮满叔打理罗兰咖啡同时坚持自学