title: Slider step in WP7
body: <p>How I can get step (0.5) in slider control in WP7?</p>
  
  <p>It can change values like 0.5-1.0-1.5-2.0...</p>
  
  <p><img src="https://i.stack.imgur.com/nPFj7.png" alt="slider wp7"></p>