title: WPF: Slide Grid left with fade
body: <p>What I want is for a user to click "Next" and then the current "page" of content (actually just a grid) slides left (off screen) and fades out whilst the new content slides in left from off the screen whilst fading in.</p>
  
  <p>How can I achieve this as easily (and reusable) as possible?</p>