var response = await httpClient.PostAsync(endpoint, new FormUrlEncodedContent(parameters));

            var result = await response.Content.ReadAsStreamAsync();

            var reader = new StreamReader(result);

            var str = reader.ReadToEnd();

            //if (response.Content != null && response.IsSuccessStatusCode)

            //{

            //    var ser = new DataContractJsonSerializer(typeof (OAuth2TokenResult));

            //    tokenResult = (OAuth2TokenResult) ser.ReadObject(responseContent);

            //}