title: How to access NavigateToString property of a WebView in a ListView
body: <p>I've got a <code>ListView</code> which contains, among other things, a <code>WebView</code>. When a <code>ListViewItem</code> on this list is selected, I'd like to bind HTML to the <code>WebView</code> via the <code>NavigateToString</code> method. </p>
  
  <p>The WebView needs be in the bound list (as it's tied to a list of items), and <em>must</em> use NavigateToString (as the HTML content is coming from code, and is not on the web)</p>
  
  <p>Is there anyway to do this? If so, what's the best way?</p>