public void UpdateDetails()
 {
     if (Details == null)
     {
         Details = _ticketService
                   .GetOrders(Model.Id)
                   .OrderBy(x => x.MenuItemName)
                   .Select(x => string.Format("{0:#} {1} {2}", x.Quantity, x.Description, x.GetVisiblePrice()));
         RaisePropertyChanged(nameof(Details));
     }
 }