title: How do i handle the event of a selected pivot item in Windows Phone
body: <p>I have an app with 3 <code>PivotItem</code>s and an <code>ApplicationBar</code>.
  I want to hide the <code>ApplicationBar</code> when the <code>PivotItem</code>s 2 and 3 are selected, and show the <code>ApplicationBar</code> when the first <code>PivotItem</code> is selected.</p>