title: WPF ToolTip: Fade In/Out. Is it a good idea to fix the ToolTip position?
body: <p>I want to fade in/out a ToolTip how can I achieve that?</p>
  
  <p>Also, I wonder if its a good idea to fix the position of the ToolTip? eg. always at bottom? I guess the ToolTip may go off screen? And suppose I want to do that, how can I do that? Position the ToolTip a fixed position relative to the parent</p>