title: Start a Task and await later and multiple times
body: <p>In a mobile application I have a potentially long async operation (multiple async network calls grouped in an async function).</p>
  <pre><code>_myClassField = myClient.DoANumberOfNetworkCallsAsync();
  </code></pre>
  <p>I execute the call right when the app starts, then I show the splash screen and the welcome screen and only at the first user interaction (e.g.: button press) I finally await on the task and make the user wait if the response is not ready.</p>
  <pre><code>public async Task&lt;object&gt; GetMyLongAwaitedObjectAsync()
  {
      return await _myClassField;
  }
  </code></pre>
  <p>This method can be called multiple times and maybe from both UI and non UI threads.</p>
  <p>Can this be a source of problems or it is a valid pattern?</p>