title: WPF : How do I make a editable path
body: <p>I was wondering if someone could guide me on this problem :</p>
  
  <p>I need to create a path by clicking several points on a canvas, and these points would be added to the path geometry. After finishing the path, the user can "Slide" or Move the Control Vertices (anchors) of the path to adjust the shape of the path.</p>
  
  <p>I have figured out how to draw a "lasso" style path, but how do i allow the user to select and move a single point in the path ???</p>