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Soon I saw Li Jianzhong's C # Object-Oriented Design Pattern Lecture on MSDN's Webcast. A very good series of lectures gave me a new understanding of design patterns. I realized that learning design patterns, specifically learning object-oriented design patterns, should start with learning object-oriented. "The principle of object-oriented is like understanding the rules of chess, and the design pattern is equivalent to a mess. I don't know what the rules look at." Since I have been doing ASP.NET development for the previous year, although I have been writing classes, learning Duwamish to make hierarchical architecture, typed DataSet and custom entity classes, it seems that I haven't used interfaces much in the past year, and I seldom use any polymorphism. In fact, the understanding of object-oriented programming is still very vague.Any negligence in the terms of the rules or any negligence in alert required by seafarers' usual practice or special circumstances at that time.3. In sailing boats, in addition to the lights specified in paragraph 1 of this Article, two ring lights, red at the top and green at the top of or near the top of the mast, may be vertically displayed. However, these ring lamps shall not be displayed at the same time as the combined color lamps allowed in paragraph 2 of this Article.Double Difference Analysis and Strategic Goal Design (STEP 1-STEP 2): BLM is a method that starts with "gap" and ends with making up for "gap". This is the main line of business strategic planning. The generation of gap comes from the expectation of the top management of the enterprise for future goals. Undoubtedly, the strategic objectives of the business line mainly come from the decomposition of the company-level strategic objective system.View the v2 version of the image:Http://www.jiemian.com/article/2060747.html