过滤HTML代码

  public static string FilterHtml(string string_include_html)
        {
            string[] HtmlRegexArr ={
                                       #region Html 正则数组
                            @"<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"
                                        #endregion
                                   };
            string[] HtmlReplaceArr = {
                                       #region 替换Html字符
                             "",
                             "",
                             "",
                             "\"",
                             "&",
                             "<",
                             ">",
                             " ",
                             "\xa1",
                             "\xa2",
                             "\xa3",
                             "\xa9",
                             "",
                             "\r\n",
                             ""
                            #endregion
                                      };
            string string_no_html = null;
            for (int i = ; i < HtmlRegexArr.Length; i++)
            {
                System.Text.RegularExpressions.Regex regex = new System.Text.RegularExpressions.Regex(HtmlRegexArr[i], System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                string_no_html = regex.Replace(string_include_html, HtmlReplaceArr[i]);
            }
            string_no_html.Replace("<", "");
            string_no_html.Replace(">", "");
            string_no_html.Replace("\r\n", "");
            return string_no_html;
        }

以上来至网络，但个人认为还是不行。故有以下自己写的：

        /// <summary>
        /// 将Html标签转化为空
        /// </summary>
        /// <param name="strHtml">待转化的字符串</param>
        /// <returns>经过转化的字符串</returns>
        public static string GetStringNoHtml(string string_include_html)
        {
            if (String.IsNullOrEmpty(string_include_html))
            {
                return "";
            }
            else
            {
                string_include_html = string_include_html.Replace("<BR>", "\r\n").Replace("<br>", "\r\n");
                //第一种
                string string_no_html = System.Text.RegularExpressions.Regex.Replace(string_include_html, @"(<script[^>]*?>.*?</script>)|(<(.[^>]*)>)", "", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
                return string_no_html.Replace("&nbsp;", " ");
                //第二种
                //return System.Text.RegularExpressions.Regex.Replace(string_include_html, @"(<script[^>]*?>.*?</script>)|(<(.[^>]*)>)|(&nbsp;)", "", System.Text.RegularExpressions.RegexOptions.IgnoreCase);
            }
        }