title: WPF: How to change the Foreground color of a Textbox depending on the Text property of another in XAML?
body: <p>I want to make the Foreground property of a WPF Textbox red as long as its Text property does not match the Text property of another Textbox on the form.
  I can accomplish this in the code behind and through a binding with a converter. But is there a way to do it in XAML only? (I was thinking of a Trigger of some kind).</p>