public async Task SendPostRequestAsync()

in DIXFSamples/RecurringIntegrationApp/Helpers/HttpClientHelper.cs [23:56]
29 lines of code
3 McCabe index (conditional complexity)

        public async Task<HttpResponseMessage> SendPostRequestAsync(Uri uri, Stream bodyStream, string externalCorrelationHeaderValue = null)
        {
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls |
                SecurityProtocolType.Tls11 |
                SecurityProtocolType.Tls12;

            using (HttpClientHandler handler = new HttpClientHandler() { UseCookies = false })
            {
                using (HttpClient httpClient = new HttpClient(handler))
                {
                    httpClient.DefaultRequestHeaders.Authorization = AuthenticationHelper.GetValidAuthenticationHeader();

                    // Add external correlation id header id specified and valid
                    if (!string.IsNullOrEmpty(externalCorrelationHeaderValue))
                    {
                        httpClient.DefaultRequestHeaders.Add(Program.ExternalCorrelationHeader, externalCorrelationHeaderValue);
                    }

                    if (bodyStream != null)
                    {
                        using (StreamContent content = new StreamContent(bodyStream))
                        {
                            return await httpClient.PostAsync(uri, content);
                        }
                    }
                }
            }

            return new HttpResponseMessage()
            {
                Content = new StringContent("Request failed at client.", Encoding.ASCII),
                StatusCode = System.Net.HttpStatusCode.PreconditionFailed
            };
        }