title: How to set focus on element on ItemsControl?
body: <p>I've ItemsControl that its <code>ItemsSource</code> property bind to some dictionary from code behind. The <code>ItemTemplate</code> is consist of only one button. So, for each item in dictionary it creates button.</p>
  
  <p>My question is how can I set focus to one of these buttons (dynamically)?
  Should I use <code>ItemContainerGenerator.ContainerFromItem</code> ?
  Any other idea?</p>
  
  <p>Thanks in advance!</p>