title: Module twin coming back empty
body: <p>I am trying to set the desired properties on a Module's device twin, but when I retrieve the twin from the IoT Hub, it comes back full of nulls.</p>
  
  <pre><code>var moduleClient = ModuleClient.CreateFromConnectionString(connectionString);
  var moduleTwin = await moduleClient.GetTwinAsync();
  </code></pre>
  
  <p>When I inspect moduleTwin in the debugger I get</p>
  
  <p><a href="https://i.stack.imgur.com/Ywq1k.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Ywq1k.png" alt="debugger showing all properties as null"></a></p>
  
  <p>The connection string is the one for the module, copied from the IoT Hub.</p>
  
  <p>Any idea what I am doing wrong?</p>