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

            WorldMapKitWmsDesktopOverlay worldMapKitDesktopOverlay = new WorldMapKitWmsDesktopOverlay();
            winformsMap1.Overlays.Add(worldMapKitDesktopOverlay);
            winformsMap1.TrackOverlay = new MyInteractiveOverLay();
            winformsMap1.CurrentExtent = new RectangleShape(-139.2, 92.4, 120.9, -93.2);
            winformsMap1.Refresh();
        }

        class MyInteractiveOverLay : TrackInteractiveOverlay
        {
            public MyInteractiveOverLay() : base() { }

            public void MouseDoubleClick()
            {
                base.MouseDoubleClickCore(new InteractionArguments());
            }

            public void MouseDown(InteractionArguments interactionArguments)
            
            {
                base.MouseDownCore(interactionArguments);
            }
        }



        private void button_Click(object sender, EventArgs e)
        {
            Button button = sender as Button;
            if (button != null)
            {
                switch (button.Name)
                {
                    case "btnTrackNormal":

                        (winformsMap1.TrackOverlay as MyInteractiveOverLay).MouseDoubleClick();

                        switch (winformsMap1.TrackOverlay.TrackShapeLayer.InternalFeatures[0].GetWellKnownType())
                        {
              
                            case WellKnownType.Line:
                                LineShape lineShape = winformsMap1.TrackOverlay.TrackShapeLayer.InternalFeatures[0].GetShape() as LineShape;
                                lineShape.Vertices.RemoveAt(lineShape.Vertices.Count - 1);

                                winformsMap1.TrackOverlay.TrackShapeLayer.InternalFeatures[0].WellKnownBinary = lineShape.GetWellKnownBinary();
                                foreach (Vertex vertex in lineShape.Vertices)
                                {
                                    (winformsMap1.TrackOverlay as MyInteractiveOverLay).MouseDown(new InteractionArguments(){WorldX=vertex.X,WorldY=vertex.Y});
                                }
                                winformsMap1.TrackOverlay.TrackShapeLayer.InternalFeatures.Clear();
                                break;
                        }
                        winformsMap1.Refresh();
                        break;
                    case "btnTrackPoint":
                        winformsMap1.TrackOverlay.TrackMode = TrackMode.Point;
                        break;
                    case "btnTrackLine":
                        winformsMap1.TrackOverlay.TrackMode = TrackMode.Line;
                        break;
                    case "btnTrackRectangle":
                        winformsMap1.TrackOverlay.TrackMode = TrackMode.Rectangle;
                        break;
                    case "btnTrackSquare":
                        winformsMap1.TrackOverlay.TrackMode = TrackMode.Square;
                        break;
                    case "btnTrackPolygon":
                        winformsMap1.TrackOverlay.TrackMode = TrackMode.Polygon;
                        break;
                    case "btnTrackCircle":
                        winformsMap1.TrackOverlay.TrackMode = TrackMode.Circle;
                        break;
                    case "btnTrackEllipse":
                        winformsMap1.TrackOverlay.TrackMode = TrackMode.Ellipse;
                        break;
                    case "btnTrackEdit":
                        winformsMap1.TrackOverlay.TrackMode = TrackMode.None;
                        foreach (Feature feature in winformsMap1.TrackOverlay.TrackShapeLayer.InternalFeatures)
                        {
                            winformsMap1.EditOverlay.EditShapesLayer.InternalFeatures.Add(feature);
                        }
                        winformsMap1.EditOverlay.CalculateAllControlPoints();
                        winformsMap1.TrackOverlay.TrackShapeLayer.InternalFeatures.Clear();

                        winformsMap1.Refresh(new Overlay[] { winformsMap1.EditOverlay, winformsMap1.TrackOverlay });
                        break;
                    case "btnTrackDelete":
                        int lastIndex = winformsMap1.EditOverlay.EditShapesLayer.InternalFeatures.Count - 1;

                        if (lastIndex >= 0)
                        {
                            winformsMap1.EditOverlay.EditShapesLayer.InternalFeatures.RemoveAt(lastIndex);
                            winformsMap1.EditOverlay.CalculateAllControlPoints();
                        }

                        winformsMap1.Refresh(winformsMap1.EditOverlay);
                        break;
                    default:
                        winformsMap1.TrackOverlay.TrackMode = TrackMode.None;
                        break;
                }
            }
        }