public void ExpireServiceContract(ServiceContract sc)
{
if (sc.ProRateRefunded)
{
var proRateRefund = sc.PeriodPaymentAmount - CalcualteProRata(sc.StartDate, (DateTime)sc.ExpiryDate, sc.PeriodPaymentAmount,
sc.PaymentPeriod.PeriodInMonths);
var account =
_customerAccountRepository.GetAll()
.OfType <PurchaseAccount>()
.Single(p => p.PurchasedUnits.Any(u => u.Contracts.Any(c => c.ContractId == sc.ContractId)));
_accountTransactionService.AddAccountTransaction(account.CustomerAccountId, AccountTransactionType.Refund,
-proRateRefund, AccountTransactionInputType.Charge, 0, "Service Contract :" + sc.ContractType.Description);
}
}