title: How to write an async method with out parameter?
body: <p>I want to write an async method with an <code>out</code> parameter, like this:</p>
  
  <pre><code>public async void Method1()
  {
      int op;
      int result = await GetDataTaskAsync(out op);
  }
  </code></pre>
  
  <p>How do I do this in <code>GetDataTaskAsync</code>?</p>