title: How to implement a lazy load GridView on WinRT?
body: <p>I need to implement a gridview of thumbs. But when my app hit 200 thumbs, it starts to get memory problems(of course). I need to implement a lazy load but I don't know how to detect where the scrollviewer are on the gridview so I could try to load more images once it reaches the end.</p>
  
  <p>Here's my gridview layout:
  <img src="https://i.stack.imgur.com/gQPJi.png" alt="Example"></p>
  
  <p>Does anyone know how to do it?</p>