title: WPF spline curve chart by templating lineseries
body: <p>I have an requirement in my application to create spline chart instead lineseries chart. I know WPF doesn't provide splineseries directly. </p>
  
  <p>How I can customize (template) lineseries chart to display curve graph, I don't want to use any third part paid tools.</p>
  
  <p>Thanks</p>