title: Wpf xaml -IsExpanded true for only first element only
body: <p>How can I make it so that <code>Wpf xaml -IsExpanded</code> is always true for <em>just</em> the first element?</p>
  
  <p><a href="https://i.stack.imgur.com/TxTLv.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/TxTLv.png" alt="enter image description here"></a></p>