title: Create triangle shape in a corner xamarin forms
body: <p>I need to create a triangle at the corner of a label/frame like the pic below with a number/small text in it.But just a way to draw the corner would be a great start.</p>
  
  <p>How Can you do you do that ?
  Any sample anywhere. Many thanks</p>
  
  <p><a href="https://i.stack.imgur.com/C5ts8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/C5ts8.png" alt="enter image description here"></a></p>