public override void ViewDidUnload()
        {
            base.ViewDidUnload ();

            ReleaseDesignerOutlets ();

            if (mapView != null) {
                mapView.Dispose ();
                mapView = null;
            }
        }
        public override void ViewDidLoad()
        {
            base.ViewDidLoad ();
            mapView = new YMKMapView(new RectangleF(0, 50, 480, 350));
            this.View.AddSubview(mapView);
            mapView.showsUserLocation = true;
            mapView.showTraffic = false;

            YMKMapCoordinate moscowCenter = new YMKMapCoordinate(55.757172, 37.55347);
            mapView.setCenterCoordinate(moscowCenter, 13, false);
        }