title: Windows Phone App navigation issues
body: <p>I have an application in which within one page i hit a web service and take response and save it into database and shown data into the list.
  next i have a refresh button to refresh and load the list again from web service. while refreshing if i click the device back button, then i am not redirected to the desired page instead it closes the application.</p>
  
  <pre><code>protected override void OnBackKeyPress(System.ComponentModel.CancelEventArgs e)
     {
       Dispatcher.BeginInvoke(() =&gt;
        {
         NavigationService.Navigate(new Uri("/MyApp/MSample.xaml", UriKind.Relative));
        });     
     }
  </code></pre>