protected override void HandleError(Exception e)
{
//remove the grid in case it was the source of the exception, as GTK# expose exceptions can fire repeatedly
//also user should not be able to edit things when showing exceptions
if (propertyGrid != null)
{
Gtk.Container parent = propertyGrid.Parent as Gtk.Container;
if (parent != null)
{
parent.Remove(propertyGrid);
}
propertyGrid.Destroy();
propertyGrid = null;
}
//show the error message
base.HandleError(e);
}