private void UseRotationProjectionForAFeatureLayer_Load(object sender, EventArgs e)
        {
            winformsMap1.MapUnit = GeographyUnit.DecimalDegree;
            winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean);

            ShapeFileFeatureLayer StatesLayer = new ShapeFileFeatureLayer(@"..\..\SampleData\Data\usstates.shp");
            StatesLayer.Name = "states";
            StatesLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.State1;
            StatesLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

            rotateProjection = new RotationProjection();
            StatesLayer.FeatureSource.Projection = rotateProjection;

            LayerOverlay worldOverlay = new LayerOverlay();
            worldOverlay.Layers.Add("StatesLayer", StatesLayer);
            winformsMap1.Overlays.Add("WorldOverlay", worldOverlay);
            winformsMap1.ZoomLevelSnapping = ZoomLevelSnappingMode.None;
            winformsMap1.CurrentExtent = rotateProjection.GetUpdatedExtent(new RectangleShape(-180.0, 83.0, 180.0, -90.0));
            winformsMap1.MapClick += new EventHandler<MapClickWinformsMapEventArgs>(winformsMap1_MapClick);
            winformsMap1.MouseDoubleClick += new MouseEventHandler(winformsMap1_MouseDoubleClick);
            winformsMap1.Refresh();
        }

        void winformsMap1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            LayerOverlay worldOverlay = winformsMap1.Overlays["WorldOverlay"] as LayerOverlay;
            ShapeFileFeatureLayer worldLayer = worldOverlay.Layers["WorldLayer"] as ShapeFileFeatureLayer;
            ShapeFileFeatureLayer StatesLayer= worldOverlay.Layers["StatesLayer"] as ShapeFileFeatureLayer;
            worldLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.Country2;
            StatesLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.Sand1;

            winformsMap1.Refresh();

        }

        void winformsMap1_MapClick(object sender, MapClickWinformsMapEventArgs e)
        {
            LayerOverlay worldOverlay = winformsMap1.Overlays["WorldOverlay"] as LayerOverlay;
            ShapeFileFeatureLayer worldLayer = new ShapeFileFeatureLayer(@"..\..\SampleData\Data\Countries02.shp");
            worldLayer.Name = "world";
            worldLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.Country1;
            worldLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
            worldLayer.FeatureSource.Projection = rotateProjection;
            worldOverlay.Layers.Add("WorldLayer", worldLayer);
            worldOverlay.Layers.MoveToBottom("WorldLayer");
            winformsMap1.Refresh();
        }

        private void btnRotateCounterclockwise_Click(object sender, EventArgs e)
        {
            rotateProjection.Angle += 45;
            winformsMap1.CurrentExtent = rotateProjection.GetUpdatedExtent(winformsMap1.CurrentExtent);
            winformsMap1.Refresh(winformsMap1.Overlays["WorldOverlay"]);
        }

        private void btnRotateClockwise_Click(object sender, EventArgs e)
        {
            rotateProjection.Angle -= 45;
            winformsMap1.CurrentExtent = rotateProjection.GetUpdatedExtent(winformsMap1.CurrentExtent);
            winformsMap1.Refresh(winformsMap1.Overlays["WorldOverlay"]);
        }