public virtual void AddBill(BillPaymentBill bill) { bill.Payment = this; bills.Add(bill); if (BillsChanged != null) { BillsChanged(this, null); } }
public virtual void RemoveBill(BillPaymentBill bill) { if (bills.Contains(bill)) { bills.Remove(bill); if (BillsChanged != null) { BillsChanged(this, null); } } }