public Guid?ReturnRents()
{
Receipt overdueReceipt = null;
if (MessageBox.Show(ReturningLate() ? ConstStrings.Get("ReturnAndPaymentLateFeeQuestion") : ConstStrings.Get("ReturnQuestion"), ConstStrings.Get("Question"), MessageBoxButton.YesNo, MessageBoxImage.Question) == MessageBoxResult.Yes)
{
List <Rent> returns = new List <Rent>();
foreach (Rent rent in checkedRents.Keys)
{
returns.Add(rent);
}
overdueReceipt = CurrentCustomer.ReturnRents(returns);
}
checkedRents.Clear();
CheckedRentsChangedSignal = true;
CheckedRentsChangedSignal = false;
CanReturnItems = false;
return(overdueReceipt == null ? null : (Guid?)overdueReceipt.Oid);
}
