using (HttpClient client = GetClient(cServerBaseAddress))
                {
                    using (HttpResponseMessage response = await client.PostAsync(url, new ByteArrayContent(File.ReadAllBytes(cFilename))))
                    {
                        responseContent = await response.Content.ReadAsStringAsync();
                        response.EnsureSuccessStatusCode();
                        string newContentId = Newtonsoft.Json.Linq.JToken.Parse(
                        response.Content.ReadAsStringAsync().Result).ToString();
                        return newContentId;
                    }
                }