void ReleaseDesignerOutlets()
        {
            if (DestinationField != null)
            {
                DestinationField.Dispose();
                DestinationField = null;
            }

            if (MapView != null)
            {
                MapView.Dispose();
                MapView = null;
            }

            if (OkButton != null)
            {
                OkButton.Dispose();
                OkButton = null;
            }
        }