Clicking the back arrow causes unhandled exception.


I recieved an unhandled exception. While clicking on the back arrow within the list view.
I was clicking back mulitiple times, probably fast enogh to cause the exception.
In itself it does not happen very often but it probably should be trapped :)
I have recieved unhandled exception in the ShowFolder function as well.
I don't feel that the back arrow is a standard UI element within the list view. Instead of using the arrow. I would use a Autofilled Combo Box, to display the current location, button toolbar with back and forward, like "My Computer".
I would also use a background worker while populating the folder size.
Thanks a bunch for making this application I have been using it for years. Keep up the good work.