获取html字符，只显示文字信息

很好用的方法
//替换掉html字符，只显示文字信息。  
       public string replaceHtmlCode(string Htmlstring)
       {
           Htmlstring = Htmlstring.Replace("<br/>", "\n");
           Htmlstring = Htmlstring.Replace("<br/>", "\r\n");
           Htmlstring = Htmlstring.Replace("&lt;", "<");
           Htmlstring = Htmlstring.Replace("&gt;", ">");
           Htmlstring = Htmlstring.Replace("&quot;", "\"");
           Htmlstring = Htmlstring.Replace("nbsp;", "   ");
           Htmlstring = Htmlstring.Replace("&amp;", "");
           Htmlstring = Regex.Replace(Htmlstring, @"<script[^>]*?>.*?</script>", "", RegexOptions.IgnoreCase);
           //删除HTML  
           Htmlstring = Regex.Replace(Htmlstring, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);
           Htmlstring = Regex.Replace(Htmlstring, @"([\r\n])[\s]+", "", RegexOptions.IgnoreCase);
           Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase);
           Htmlstring = Regex.Replace(Htmlstring, @"<!--.*", "", RegexOptions.IgnoreCase);
           Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "\"", RegexOptions.IgnoreCase);
           Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase);
           Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", "<", RegexOptions.IgnoreCase);
           Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase);
           Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", "   ", RegexOptions.IgnoreCase);
           Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "\xa1", RegexOptions.IgnoreCase);
           Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "\xa2", RegexOptions.IgnoreCase);
           Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "\xa3", RegexOptions.IgnoreCase);
           Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "\xa9", RegexOptions.IgnoreCase);
           Htmlstring = Regex.Replace(Htmlstring, @"&#(\d+);", "", RegexOptions.IgnoreCase);

           Htmlstring.Replace("<", "");
           Htmlstring.Replace(">", "");
           Htmlstring.Replace("\r\n", "");

           //对字符串长度进行判断。然后依据长短进行截取  
           if (Htmlstring.Length < 100)
           {//如果长度小于40个汉字  
               return Htmlstring;
           }
           else
           {
               Htmlstring = Htmlstring.Substring(0, 100) + "...";
               return Htmlstring;
           }
       }

来自：junzhang4008（程序可以让尸体动起来）