title: Not receiving response after PostAsync
body: <p>I have next part of code :</p>
  
  <pre><code>using (var client = new HttpClient()) // from Windows.Web.Http;
  {
      //setup client
      var tokenUri = new Uri(apiBaseUri + "/token");
      client.DefaultRequestHeaders.Accept.Clear();
      client.DefaultRequestHeaders.Accept.Add(
                          new HttpMediaTypeWithQualityHeaderValue("application/json"));
  
      //setup login data
      IHttpContent formContent = new HttpFormUrlEncodedContent(new[]
      {
           new KeyValuePair&lt;string, string&gt;("grant_type", "password"),
           new KeyValuePair&lt;string, string&gt;("username", userName),
           new KeyValuePair&lt;string, string&gt;("password", password),
      });
  
      //send request
      HttpResponseMessage responseMessage = await client.PostAsync(tokenUri, formContent);
  
      //get access token from response body
      var responseJson = await responseMessage.Content.ReadAsStringAsync();
      var jObject = JObject.Parse(responseJson);
      return jObject.GetValue("access_token").ToString();
  }
  </code></pre>
  
  <p>This makes call to my Web Api. I have checked if it's really works with fiddler - as result I can see response what i espect (Bearer token). But in code this response are never received. </p>
  
  <p>What is the problem?</p>