ASP.NETはモバイルデバイスアクセスかどうかを判断する

/// <summary>
        ///            。
        /// </summary>
        public static bool IsMobile
        {
            get
            {
                bool result = false;
                HttpContext context = HttpContext.Current;
                if (context != null)
                {
                    HttpRequest request = context.Request;
                    string useragent = request.UserAgent;
                    if (useragent.IndexOf("android") > -1 || useragent.IndexOf("ipod") > -1 || useragent.IndexOf("iphone") > -1 || useragent.IndexOf("ipad") > -1 || useragent.IndexOf("ucweb") > -1)
                    {
                        result = true;
                    }
                }
                return result;
            }
        }