MARKUS

        public override void Copy(CommentUserInfo lhs)

        {

            if (lhs is CircleControl CircleCtrl)

            {

                this.LineSize = CircleCtrl.LineSize;

                this.Paint = CircleCtrl.Paint;

                this.StartPoint = new Point(CircleCtrl.StartPoint.X, CircleCtrl.StartPoint.Y);

                this.EndPoint = new Point(CircleCtrl.EndPoint.X, CircleCtrl.EndPoint.Y);

                this.LeftBottomPoint = new Point(CircleCtrl.LeftBottomPoint.X, CircleCtrl.LeftBottomPoint.Y);

                this.TopRightPoint = new Point(CircleCtrl.TopRightPoint.X, CircleCtrl.TopRightPoint.Y);

                this.Opacity = CircleCtrl.Opacity;

                this.CommentAngle = CircleCtrl.CommentAngle;

                this.DashSize = CircleCtrl.DashSize;

                this.PointSet = CircleCtrl.PointSet.ConvertAll(x => new Point(x.X, x.Y));

                this.StrokeColor = CircleCtrl.StrokeColor;

                this.UserID = CircleCtrl.UserID;

                this.Memo = CircleCtrl.Memo;

            }

        }

        public override CommentUserInfo Clone()

        {

            var clone = new CircleControl();

            clone.Copy(this);

            return clone;

        }