title: WPF attach popup with a control
body: <p>I have a scenario where I am displaying a popup on my control. I am able to do this using <code>PlacementTarget</code>, <code>Position</code>, etc. </p>
  
  <p>My problem is when I resize the window and move it to somewhere else in the desktop, the popup remains stationary meaning it doesn't move with the control set as <code>PlacementTarget</code>. I was able to hide it in case of other window getting focus. But not able to attach it with my control.</p>
  
  <p>How can I solve this problem?
  Is there any other such control available?</p>