protected override void AddOverlays()
        {
            base.AddOverlays();

            _shadeAreaOverlay = new ShadeAreaOverlay(Activity);
            MapView.OverlayManager.Add(_shadeAreaOverlay);

            SetLimitScrolling(true);
            HasOptionsMenu = true;
        }
        protected override void AddOverlays()
        {
            base.AddOverlays();

            _shadeAreaOverlay = new ShadeAreaOverlay(Activity);
            MapView.OverlayManager.Add(_shadeAreaOverlay);

            SetLimitScrolling(true);
            HasOptionsMenu = true;
        }