BoxKite.Twitter.UserSession.GetAsync C# (CSharp) Метод

        public new async Task<HttpResponseMessage> GetAsync(string url, SortedDictionary<string, string> parameters) 
        {
            if (TwitterCredentials == TwitterCredentials.Null || TwitterCredentials.Valid == false)
                throw new ArgumentException("TwitterCredentials must be specified and validated");

            var querystring = parameters.Aggregate("", (current, entry) => current + (entry.Key + "=" + entry.Value + "&"));

            var oauth1aAuthheader = BuildAuthenticatedResult(url, parameters, "GET");
            var fullUrl = url;

            var handler = new HttpClientHandler();
            if (handler.SupportsAutomaticDecompression)
            {
                handler.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
            }
            var client = new HttpClient(handler);
            client.DefaultRequestHeaders.Add("Authorization", oauth1aAuthheader.Header);
            client.DefaultRequestHeaders.Add("User-Agent", TwitterApi.UserAgent());

            if (!string.IsNullOrWhiteSpace(querystring))
                fullUrl += "?" + querystring.Substring(0, querystring.Length - 1);

            var download = client.GetAsync(fullUrl).ToObservable().Timeout(TimeSpan.FromSeconds(waitTimeoutSeconds));
            var clientdownload = await download;

            return clientdownload;
        }