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;
}