过滤一段字符串中HTML代码的方法

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;
    }