private static HtmlDocument GetXHtmlFromUri(string uri)   {
            HtmlDocument htmlDoc = new HtmlDocument()
            {
                OptionCheckSyntax = true,
                OptionFixNestedTags = true,
                OptionAutoCloseOnEnd = true,
                OptionDefaultStreamEncoding = Encoding.UTF8
            };

            var request = (HttpWebRequest)WebRequest.Create(uri);
            request.Method = "GET";



            //important
             request.UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)";
             request.Accept = "text/html";
            request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;

            using (var response = request.GetResponse() as HttpWebResponse)
            {
                using (var stream = response.GetResponseStream())
                {
                    htmlDoc.Load(stream, Encoding.UTF8);
                }
            }
            return htmlDoc;
        }

private static HtmlDocument GetXHtmlFromUri2(string uri)        {
            WebClient client = new WebClient() { Encoding = Encoding.UTF8 };
            client.Headers.Add("user-agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)");

            HtmlDocument htmlDoc = new HtmlDocument()
            {
                OptionCheckSyntax = true,
                OptionFixNestedTags = true,
                OptionAutoCloseOnEnd = true,
                OptionDefaultStreamEncoding = Encoding.UTF8
            };

            htmlDoc.LoadHtml(client.DownloadString(uri));

            return htmlDoc;
        }