title: How to set device's twin properties without Etag?
body: <p>I am using the API:</p>
  
  <pre><code>RegistryManager.UpdateTwinAsync(string deviceId, Twin twinPatch, string etag);
  </code></pre>
  
  <p>However, it need to call device's twin first:</p>
  
  <pre><code>Twin twin= await _registryManager.GetTwinAsync(deviceId);
  var etag = twin.Etag
  </code></pre>
  
  <p>So I need to 2 I/O call, that decreases application performance.</p>
  
  <p>Is there any way to set device's twin without getting Etag first?</p>
  
  <p>Thanks,</p>