提取HTML代码中文字的C#函数

/// <summary>
  /// 去除HTML标记
  /// </summary>
  /// <param name="strHtml">包括HTML的源码 </param>
  /// <returns>已经去除后的文字</returns>
  public static string StripHTML(string strHtml)
  {
   string [] aryReg ={
          @"<script[^>]*?>.*?</script>",

          @"<(\/\s*)?!?((\w+:)?\w+)(\w+(\s*=?\s*(([""'])(\\[""'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 [] aryRep = {
           "",
           "",
           "",
           "\"",
           "&",
           "<",
           ">",
           " ",
           "\xa1",//chr(161),
           "\xa2",//chr(162),
           "\xa3",//chr(163),
           "\xa9",//chr(169),
           "",
           "\r\n",
           ""
          };

   string newReg =aryReg[0];
   string strOutput=strHtml;
   for(int i = 0;i<aryReg.Length;i++)
   {
    Regex regex = new Regex(aryReg[i],RegexOptions.IgnoreCase );
    strOutput = regex.Replace(strOutput,aryRep[i]);
   }

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

   return strOutput;
  }