public async Task <ActionResult> CreateSitemap(string url)
        {
            var entireWatch  = Stopwatch.StartNew();
            var links        = _sitemapService.GetLinks(url);
            var sitemap      = _repository.AddSitemap(url);
            var sitemapLinks = new List <SitemapLink>();
            var tasks        = new List <Task>();

            foreach (var link in links)
            {
                var task = new Task(() =>
                {
                    var info = new SitemapLink
                    {
                        HttpAddress = link
                    };
                    var watch  = Stopwatch.StartNew();
                    var result = _client.GetAsync(link).Result;
                    watch.Stop();
                    info.ShortestTime = watch.ElapsedMilliseconds;
                    info.LongestTime  = watch.ElapsedMilliseconds;
                    sitemapLinks.Add(info);
                    info.Sitemap = sitemap;
                });
                tasks.Add(task);
                task.Start();
                task.Wait();
            }
            entireWatch.Stop();
            _repository.AddSitemapLinks(sitemap.Id, sitemapLinks);

            ViewBag.LinkName_List     = string.Join(",", sitemapLinks.Select(c => string.Format("'{0}'", c.HttpAddress)).ToList());
            ViewBag.LongestTime_List  = string.Join(",", sitemapLinks.Select(c => c.LongestTime).ToList());
            ViewBag.ShortestTime_List = string.Join(",", sitemapLinks.Select(c => c.ShortestTime).ToList());

            return(View(sitemapLinks.OrderByDescending(u => u.LongestTime).ToList()));
        }