title: Formatting textbox string for currency
body: <p>I have a textbox in WPF and I would like to dynamically show the currency symbol, i.e. when the user edits the textbox and the textbox loses the focus, the currency symbol is automatically inserted at the end (beginning). I prefer it in XAML rather than hard-coding.
  I would like to mention that my textbox is <strong>not binded</strong> to anything.</p>