private void CloseLabel()
 {
     RegionManager.Regions[RegionNames.OptionRegion].RemoveAll();
     LabelViewList.Remove(SelectedLabelView);
     if (LabelViewList.Count > 0)
     {
         SelectedLabelView = LabelViewList[LabelViewList.Count - 1];
     }
     else
     {
         SelectedLabelView = null;
     }
 }
        private void AddLabel(LabelViewModel newLVM)
        {
            if (!CheckLicense())
            {
                return;
            }

            if (newLVM != null)
            {
                var newView = new LabelView();
                newView.DataContext = newLVM;
                LabelViewList.Add(newView);
                SelectedLabelView = newView;
            }
        }