摘要： A Windows script (*.wsf) file is a text document containing Extensible Markup Language (XML) code. It incorporates several features that offer you increased scripting flexibility. Because Windows script files are not engine-specific, they can contain script from any Windows Script compatible scripti 阅读全文

摘要： The System.Linq.Expressions namespace contains classes, interfaces and enumerations that enable language-level code expressions to be represented as objects in the form of expression trees. 也就是使用该命名空间中的类可以将一段代码表示为对象。在System.Linq.Expressions中，列举了很多种的表达式，其中包括：BinaryExpression,ConditionalExpression,Con 阅读全文

摘要： Google推出的Chrome让大家热议纷纷，只有专业用户才会注意到用Chrome访问网页时发出的“Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/525.13 (KHTML, like Gecko) Chrome/0.2.149.27 Safari/525.13”UserAgent字符串，貌似天书，它到底是怎么回事儿代表什么呢？我们来看看吧：最早的时候有一个浏览器叫NCSA Mosaic，把自己标称为NCSA_Mosaic/2.0 (Windows 3.1)，它支持文字显示的同时还支持图片，于是Web开始好玩起来。然后出 阅读全文

摘要： IntroductionWhen you visit a Web page, your browser sends the user-agent string to the server hosting the site that you are visiting. This string indicates which browser you are using, its version number, and details about your system, such as operating system and version. The Web server can use thi 阅读全文