private void WpfMap_Loaded(object sender, RoutedEventArgs e)
        {
            wpfMap1.MapUnit = GeographyUnit.DecimalDegree;
            wpfMap1.CurrentExtent = new RectangleShape(-133.2515625, 89.2484375, 126.9046875, -88.290625);
            wpfMap1.Refresh();
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            Vertex MyPosition = new Vertex(0, 0);
            PolygonShape Polygon = new PolygonShape();
            Polygon = (wpfMap1.TrackOverlay.TrackShapeLayer.InternalFeatures[0].GetShape() as PolygonShape);


            List<Vertex> listForInsertingVertex = new List<Vertex>(Polygon.OuterRing.Vertices);
            listForInsertingVertex.RemoveAt(listForInsertingVertex.Count - 1);
            listForInsertingVertex.Insert(0, MyPosition);
            listForInsertingVertex.Add(MyPosition);

            Polygon.OuterRing.Vertices.Clear();

            foreach (Vertex vertex in listForInsertingVertex)
            { Polygon.OuterRing.Vertices.Add(vertex); }

            wpfMap1.TrackOverlay.TrackShapeLayer.InternalFeatures[0].WellKnownBinary = Polygon.GetWellKnownBinary();
            wpfMap1.TrackOverlay.Refresh();
        }