title: garbage collection in vb.net
body: <p>what to do when a stack frame is preventing a form from being garbage collected
  in vb.net.</p>
  
  <p>details :
  I have created a form and call another form to be shown from the form.when the second form is shown the first is closed and disposed .But the first form is not being garbage collect. A stack frame is preventing it from being garbage collected what should I do</p>