private static void OnContentChange(object sender, DependencyPropertyChangedEventArgs e)
{
WorkFrame frame = (WorkFrame)sender;
if (e.OldValue != null)
{
((WorkPage)e.OldValue).Frame = null;
}
if (e.NewValue != null)
{
((WorkPage)e.NewValue).Frame = (WorkFrame)sender;
if (frame.ContentControl != null)
{
frame.ContentControl.Content = e.NewValue;
}
}
else
{
if (e.OldValue != null && frame.Close != null)
{
frame.Close(frame, null);
}
}
}
