title: How would you implement crosshair in DDD WPF Charts?
body: <p>I ended up using DDD as my main charting for WPF. Need to implement crosshair (two lines which follow mouse pointer).</p>
  
  <p>Which particular class in DDD is the best to override?</p>
  
  <p><strong>EDIT</strong> : actually I discovered that there is already element which does what I need. Just add this into the Plotter XAML.</p>
  
  <pre><code>&lt;ddd:CursorCoordinateGraph/&gt;
  </code></pre>