Ch.Epix.WindMobile.WP7.View.ChartView.OnOrientationChanged C# (CSharp) Method

        protected override void OnOrientationChanged(OrientationChangedEventArgs e)
        {
            if (e.Orientation == PageOrientation.PortraitDown || e.Orientation == PageOrientation.PortraitUp)
            {
                NavigationService.GoBack();
            }
            base.OnOrientationChanged(e);
        }