title: Space between buttons on Windows Phone
body: <p>I'm creating a game (minesweeper) for my Windows Phone.
  There is a grid and this app automatically creates buttons (cells) by a double for loop (<code>i</code> for columns and <code>j</code> for rows).
  The position of a button is <code>(CellWidth * i, CellHeigth * j, 0, 0)</code>.</p>
  
  <p>The problem is the space between the buttons, and I don't know why it exist!
  By code there isn't any space between the buttons.</p>
  
  <p><img src="https://i.stack.imgur.com/BByMd.png" alt="screenshot"></p>