正则判断是不是移动端浏览

public bool IsMobile()
        {  
            Regex RegexMobile = new Regex(@"(iemobile|iphone|ipod|android|nokia|sonyericsson|blackberry|samsung|sec-|windows ce|motorola|mot-|up.b|midp-)", RegexOptions.IgnoreCase | RegexOptions.Multiline);
            if (Request.Browser.IsMobileDevice)
            {
                return true;
            }

            if (!string.IsNullOrEmpty(Request.UserAgent) && RegexMobile.IsMatch(Request.UserAgent))
            {
                return true;
            }
            return false;
        }