C# 正则提取网页内容

        string zhengze = "(?<=<title>)(.*?)(?=</title>)"; //建立正则匹配

        try

        {

            Match m = Regex.Match(result, zhengze);  //正则匹配

            if (m.Success)

            {

                HtmlCodeNew = m.Value;

                Response.Write(HtmlCodeNew);

            }

        }

        catch