title: Scrolling vertically grid content
body: <p>I'm developing a Windows Phone application.</p>
  
  <p>I have a phone page with a big textblock and a picture inside on a stackpanel. Because the textblock is big the picture isn't visible. I set <strong>VerticalScrollBarVisibility="Visible"</strong> on stackpanel but I can't see the picture.</p>
  
  <p>How can I use a scrollbar to see the content bellow the textblock?</p>