public static void ZoomAndFlash(IMapControl3 mapctrl, IFeature feat)        {            MapHelper.ZoomToFeature(mapctrl.ActiveView, feat);            IGeometry shape = mapctrl.ActiveView.Extent;            (shape as ITransform2D).Scale((shape as IArea).Centroid, 1.5, 1.5);            mapctrl.ActiveView.Extent = shape.Envelope;            mapctrl.ActiveView.ScreenDisplay.UpdateWindow();            MapHelper.FlashGeometry(mapctrl, feat.ShapeCopy);        }