title: Livecharts change default legend
body: <p>Here is my problem.</p>
  
  <p>I am using LiveCharts to display some data.
  Everything fine until showing the legend which represents all the data displayed.</p>
  
  <p><a href="https://i.stack.imgur.com/EfPbH.png" rel="nofollow noreferrer">chart with legend</a></p>
  
  <p>Is it possibile to show a legend based on for example color(Stroke) or DefaultGeometries?</p>
  
  <p>Thanks in advance for your help,</p>
  
  <p>Diego</p>