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

        public async Task<HttpResponseMessage> PostAsync(string url, SortedDictionary<string, string> parameters, bool forInitialAuth = false)
        {
            if (forInitialAuth)
            {
                if (clientID == null && clientSecret == null)
                {
                    return null;
                }
            }
            else
            {
                if (clientID != null && clientSecret != null && bearerToken == null)
                {
                    await this.StartApplicationOnlyAuth();
                }
                if (bearerToken == null) return null;
            }

            var querystring = parameters.Aggregate("", (current, entry) => current + (entry.Key + "=" + entry.Value + "&"));
            if (!string.IsNullOrWhiteSpace(querystring))
                querystring = querystring.TrimLastChar();

            var oauth2Bearertoken = forInitialAuth
                ? String.Format("Basic {0}",
                    String.Format("{0}:{1}", clientID.UrlEncode(), clientSecret.UrlEncode()).ToBase64String())
                : String.Format("Bearer {0}", bearerToken);

            var handler = new HttpClientHandler();
            var client = new HttpClient(handler);
            if (handler.SupportsAutomaticDecompression)
            {
                handler.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
            }
            client.DefaultRequestHeaders.Add("Authorization", oauth2Bearertoken);
            client.DefaultRequestHeaders.Add("User-Agent", TwitterApi.UserAgent());

            var data = new StringContent(querystring, Encoding.UTF8, "application/x-www-form-urlencoded");

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