介绍如何用C#实现抓取网页内容。包括1、抓取一般内容。2 抓取网页内容－图片。3、抓取网页内容－Post 数据。4、抓取网页内容－防止重定向。5、抓取网页内容－保持登录状态。-Describes how to use C# to grab web content. Including crawl the general content. Crawl Web content- pictures. 3, spider web content-Post data. 4, crawling web content- to prevent redirection. 5, spider web content- and stay logged in.