title: How to bind Line end point (X2,Y2) to Point?
body: <p>Is there anyway to bind <code>Line.X2</code> and <code>Line.Y2</code> to <code>Point</code>'s <code>X</code> and <code>Y</code> ? For now, when i use</p>
  
  <pre><code>line.DataContext=testPoint;
  line.SetBinding(Line.X2Property,new Binding("X"));
  line.SetBinding(Line.Y2Property,new Binding("Y"));
  </code></pre>
  
  <p>it works for 1st time, then when i change <code>testPoint.X</code> or <code>testPoint.Y</code> it doesn't changes. What to do?</p>
  
  <p><strong>[EDIT]</strong>
  I have many <code>Lines</code> and even it may increase, because of that i cannot create <code>Point</code> property for each <code>Line</code>.</p>