MARKUS

                    Markup_List = new List<Multi_Undo_data>()

                };

                {

                    case ControlType.Rectangle:

                        {

        public void Undo()

        {

            Undo_data undo = new Undo_data();

            AdornerFinal final;

            ReleaseAdorner();

        public void Redo()

        {

            AdornerFinal final;

            Undo_data redo = new Undo_data();

            redo = ViewerDataModel.Instance.UndoDataList.Where(data => data.IsUndo == true).ToList().OrderBy(order => order.EventTime).FirstOrDefault();