title: Windows Phone Silverlight page navigation
body: <p>I have two questions here about Windows Phone page navigation:</p>
  
  <ol>
  <li>Is there a way to get the instance of the page I am navigating to? That is, if I am on page one and want to navigate to page2 to when button click, can I get the page2 instance after page2 is initialized by <code>NavigationService.Navigate("page_2_uri")</code> call in page 1?</li>
  <li>Is there a way I can know which page I navigate from? For example, I am currently on page3, and I want to do something like: if page 3 is navigated from page 2, I will do this, otherwise I will do that.</li>
  </ol>
  
  <p>Thank you.</p>