title: WPF Binding StringFormat
body: <p>I'm trying to format a textblock bound to an integer. What I want is to show (+25) for positive number and (-25) for a negative one.
  So far i have been able to do it separately with the following xaml:</p>
  
  <pre><code>  StringFormat={}({0})}  // shows binding in a bracket
    StringFormat=+#;-#;0   // shows the sign
  </code></pre>
  
  <p>What would the xaml for the combined formatting be ?</p>