感谢开源，小反馈

[itldg]

非常感谢开源，测试了几个网页发现一些小问题
注释错误，标题建议匹配H2和H3
另外压缩的网页有换行
H1中的内容有时候并不能被设定为标题
做了小调整

    /// <summary>
    /// 获取网页标题
    /// </summary>
    /// <param name="html">网页代码</param>
    /// <returns>返回处理过的标题</returns>
    private static string GetTitle(string html)
    {
        string titleFilter = @"<title>[\s\S]*?</title>";
        string clearFilter = @"<.*?>";

        string title = "";
        Match match = Regex.Match(html, titleFilter, RegexOptions.IgnoreCase);
        if (match.Success)
        {
            title = Regex.Replace(match.Groups[0].Value, clearFilter, "");
        }

        // 正文的标题一般在h1中，比title中的标题更干净
        for (int i = 1; i < 4; i++)
        {
            string h1Filter = @"<h"+i+ ".*?>[\\s\\S]*?</h" + i+">";
            MatchCollection mcs = Regex.Matches(html, h1Filter, RegexOptions.IgnoreCase);
            if (mcs.Count==1)
            {

                    string h = Regex.Replace(mcs[0].Groups[0].Value, clearFilter, "").Trim();
                    if (!String.IsNullOrEmpty(h) && title.Trim().Contains(h))
                    {
                        title = h;
                    }
                
                
            }
        }
       

        return title;
    }