title: How to draw an arrow in Silverlight
body: <p>I need to draw an arrow between controls in a canvas. Currently I'm using the <code>Line</code> object but it doesn't have a way to draw a triangle at the end of the line.</p>
  
  <p>This is roughly what I need:</p>
  
  <pre><code>[TextBox] &lt;----- [Button]
  </code></pre>
  
  <p>I was trying to subclass <code>Line</code> and add a couple of lines at the end but the class is sealed.</p>
  
  <p>How would you build a custom control that draws an arrow between X1,Y1 and X2,Y2?</p>