title: How do I get the width and height of a Canvas element that is set to 'Auto'?
body: <p>I'm developing an App for Windows Phone 8.1, and I have a canvas that draws a ball onto it programmatically. My problem is I want to set the boundaries of the canvas to be that of its width and height, but I'm using grids with relative sizes for the size of the canvas itself. </p>
  
  <p>I'm wondering how I can get the width and height of the canvas - I've tried actualwidth and actualheight but they're just showing '0'.</p>