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A abstract class An abstract class is a class that must be inherited and have the methods overridden. It can not be instantiated. And at least one of 阅读全文
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(Note: Most are collected from Internet. 绝大部分内容来自互联网)1. What's the difference between Hashtable and Dictionary?Hashtable and Dictionary are collection... 阅读全文
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Role:The purpose of the Singleton pattern is to ensure that there is only one instance of a class, and that there is a global access point to that obj... 阅读全文
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What is a State Machine? Any device that changes its state from one to another due to some actions are defined to be state machines. For example an AT 阅读全文
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Debug 模式下运行程序的时候,Output 窗口出来个错误“A first chance exception of type 'System.ArgumentException' occurred in System.Data.dll”。 但是并没有直接throw错误。无法知道具体在哪一步发生了... 阅读全文
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转载:http://www.cnblogs.com/fellowcheng/archive/2010/08/21/1805158.htmlExcelHelper(Excel2007)Code highlighting produced by Actipro CodeHighlighter (free... 阅读全文