/// <summary>
        /// 対象のXMLが有効かどうか判断する
        /// </summary>
        /// <param name="url"></param>
        public static bool checkRss(string url)
        {
            string title = "";
            try
            {
                RssReader rr = new RssReader(url);
                title = rr.title;
                rr.Dispose();

                return title != null;
            }
            catch
            {
                return false;
            }
        }
 public static string checkRssConnect(string url)
 {
     string title = null;
     try
     {
         RssReader rr = new RssReader(url);
         title = rr.title;
         rr.Dispose();
     }
     catch
     {
         title = null;
     }
     return title;
 }