title: How do I bind to another control's property from a trigger?
body: <p>In my particular case, I want to bind to the IsReadOnly property of a TextBox to set the Content property of a Button? They are both part of the same StackPanel.</p>
  
  <p>I've tried doing it with a DataTrigger with a Binding to the ElementName of the TextBox and a Trigger using the TextBox name as the SourceName.</p>
  
  <p>Any thoughts?</p>