asp.net去除字符串中html标签

using System.Text.RegularExpressions;

public static string ClearHTMLTag(string strHtml)
...{
   string[] arrayReg =...{
          @"<script[^>]*?>.*?</script>",

          @"<(\\/\\s*)?!?((\\w+:)?\\w+)(\\w+(\\s*=?\\s*(([""'])(file://[""'tbnr]|[^/7])*?/7|/w+)|.{0})|/s)*?(///s*)?>",
          @"([\\r\\n])[\\s]+",
          @"&(quot|#34);",
          @"&(amp|#38);",
          @"&(lt|#60);",
          @"&(gt|#62);", 
          @"&(nbsp|#160);", 
          @"&(iexcl|#161);",
          @"&(cent|#162);",
          @"&(pound|#163);",
          @"&(copy|#169);",
          @"&#(\\d+);",
          @"-->",
          @"<!--.*\\n"
         
         };

   string[] arrayRep = ...{
           "",
           "",
           "",
           "\\"",
           "&",
           "<",
           ">",
           " ",
           "\\xa1",//chr(161),
           "\\xa2",//chr(162),
           "\\xa3",//chr(163),
           "\\xa9",//chr(169),
           "",
           "\\r\\n",
           ""
          };

   string strReturn = strHtml;
   for (int i = 0; i < arrayReg.Length; i++)
   ...{
      Regex regex = new Regex(arrayReg[i], RegexOptions.IgnoreCase);
      strReturn = regex.Replace(strReturn , arrayRep[i]);
   }

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


   return strReturn;
}