public EnterViewModel(OrderViewModel vm)
 {
     ParentViewModel = vm;
     UpdateOrders();
     UpdateTags(); //+
     CreateNewCurrentOrder();//te
     CurrentDate = DateTime.Today;
 }
 public PieChartViewModel( OrderViewModel vm)
 {
     ParentViewModel = vm;
        MakePieChartList();
 }
 public SummaryViewModel(OrderViewModel vm)
 {
     ParentViewModel = vm;
     DateCollection = new ObservableCollection<DayData>();
 }