title: WPF toolkit charting : Customize datapoint label
body: <p>I have create a simple LineSeries chart using WPF toolkit. By default, on mouse over a datapoint,  it display a label with YAxis value. (if I put my mouse on the X=3,Y=45 datapoint, it will display a label with "45" inside)</p>
  
  <p>I want to change this default behavior to display both X and Y axis value. (if I put my mouse on the X=3,Y=45 datapoint, it will display a label with "3, 45" inside)</p>
  
  <p>If somebody have a suggestion, it could be great !
  Thank you and best regards,</p>
  
  <p>PY</p>