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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forums have seen beginners ask whether WCF still needs to learn in depth, because they think these technologies may be outdated.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.Business Innovation Design (STEP 4): To make up for the opportunity gap, business design innovation is required, including developing new products, implementing new business models, adopting new competitive strategies, etc. Business design can help us to design a business model that can seize market opportunities to achieve strategic objectives and the product mix strategy that should be adopted.4. (1) Except for ships out of control or ships with limited manoeuvring ability, any ship, if circumstances permit at that time, shall avoid obstructing the safe passage of ships limited to draft that display the signals of Article 28.Telecommunications男校风云冯五听了大喜，将脑袋用力往地上磕下去，哽咽道：只要今儿少爷放过我二人，冯五就算给张家做牛做马也愿意。You can get the relevant guidebook at the subway station, or you can get it directly from the station staff if you can't find it. When enjoying the discount, you only need to show your one-day ticket. The store will confirm the date behind the ticket and then provide the discount service.