System.Net.Http.HttpClient.GetByteArrayAsync C# (CSharp) Method

        public Task<byte[]> GetByteArrayAsync(Uri requestUri) =>
            GetByteArrayAsyncCore(GetAsync(requestUri, HttpCompletionOption.ResponseHeadersRead));

        async private void loadJsonInfo() 
        {
            try
            {
                //--------- Having content from website--------------
                HttpClient http = new HttpClient();
                var response = await http.GetByteArrayAsync("http://emresevinc.github.io/exrepo.html");
                String source = Encoding.GetEncoding("utf-8").GetString(response, 0, response.Length - 1);
                source = WebUtility.HtmlDecode(source);
                HtmlDocument resultat = new HtmlDocument();
                resultat.LoadHtml(source);

                List<HtmlNode> toftitle = resultat.DocumentNode.Descendants().Where
                    (x => (x.Name == "div" && x.Attributes["class"] != null &&
                    x.Attributes["class"].Value.Contains("container"))).ToList();
                String text = toftitle[0].InnerText;

                selectedMovie = new Movie();
                //----------------------------------------------------
                _jObject = JsonObject.Parse(text);  // Burada json dosyası parse ediliyor.
                jArr = _jObject.GetNamedArray("movies"); // Json verileri içindeki movies array'i
                fillToMovieList();
            }
            catch (Exception)
            {
               new MessageDialog("Bir hata gerceklesti").ShowAsync();
            }
        }