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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forums have seen beginners ask whether WCF still needs to learn in depth, because they think these technologies may be outdated.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.This is a more interesting part. I'm sorry that the text and the picture are sent separately, because the text is coded on the computer, but the computer browser is too slow to search the picture. Incidentally, I would like to say my notebook, it is really too! Slow down! Yes! I said I would replace it two years ago, but I still use it. As a notebook only used for code words, it runs too slowly.突然水波微微震动，小鱼儿一个激灵，四散着游到水潭深处。When approaching the enemy? Drive away attack: Drive away the surrounding enemies and keep a distance. There are also attacks that make the enemy faint. The attack will not be interrupted even if it is attacked by the enemy.她俩知道家人的生活习惯，从床上的铺盖帐幔到家用物什，再到厨房的锅瓢碗盏等，逐一对照原来置办的，看可有遗漏，再添上。然素谨乃是我侄女，是我姐姐的女儿，我自小便为她和田遥定亲了。在布宜诺斯艾利斯历史悠久的罗拉曼布莱夫斯剧场，阿根廷喜剧演员格雷戈罗塞略奉上了一场单口喜剧特辑