title: What screen size to use?
body: <p>So, I am developing an app for tablets in C#, WPF. I do not have one to test on it, but the customer told me the screen is 10-17 inches big.</p>
  <p>I am wondering what screen size to test my app.
  I am using the grid for layout, but when I say for example
  GridRow1.height=2*
  GridRow2.height=3*
  It does not look the same on full screen and on smaller window sizes.</p>