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.TrackOverlay = new MyTrackOverlay();
            wpfMap1.Refresh();
        }

        class MyTrackOverlay : TrackInteractiveOverlay
        {
            protected override InteractiveResult MouseClickCore(InteractionArguments interactionArguments)
            {
                return new InteractiveResult();
            }
        }