public static bool IsWebSearch() { string user_agent = HttpContext.Current.Request.UserAgent; if (null == user_agent || string.Empty == user_agent) { return(true); } else { user_agent = user_agent.ToLower(); } for (int i = 0; i < _WebSearchList.Length; i++) { if (-1 != user_agent.IndexOf(_WebSearchList[i])) { return(true); } } return(UserBrowser.Equals("Unknown")); }