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

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

            var oauth1aAuthheader = BuildAuthenticatedResult(url, parameters, "POST");
            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());

            var content = parameters.Aggregate(string.Empty, (current, e) => current + string.Format("{0}={1}&", e.Key, Uri.EscapeDataString(e.Value)));
            var data = new StringContent(content, Encoding.UTF8, "application/x-www-form-urlencoded");

            var download = client.PostAsync(url, data).ToObservable().Timeout(TimeSpan.FromSeconds(waitTimeoutSeconds));
            var clientdownload = await download;

            return clientdownload;
        }