public DeepZoomViewer()
        {
            SourceTileServer = tileServer;
            Mode = TileSystemMode.OnlineOnly;
            TileProvider = new DeepZoomTileProvider();

            ProportionsRestriction.ProportionRatio = 1;
        }
        public DeepZoomViewer()
        {
            SourceTileServer = tileServer;
            Mode             = TileSystemMode.OnlineOnly;
            TileProvider     = new DeepZoomTileProvider();

            ProportionsRestriction.ProportionRatio = 1;
        }