private void LoadOldPart()
        {
            loadPartialPay = new PartialPaymentCollection();
            loadPartialPay.LoadOldPartWithStdIdFromDb(selectedId);

            foreach (var popOld in loadPartialPay.pubOtherFeesCollect)
            {
                totalOldBal = totalOldBal + popOld.PartPay_Balance;
                oldBillId   = popOld.PartPay_Bill_Id;
                oldStdId    = popOld.PartPay_Std_Id;
            }
            myOldCollect = new OldTuitionCollection();
            myOldCollect.LoadOldTuitionFromDb();
            if (myOldCollect.pubOldCollect.All(x => (x.OldTuition_Bill_Id != oldBillId && x.OldTuition_Std_Id != oldStdId)))
            {
                if (totalOldBal != 0)
                {
                    InsertToOldTable();
                    totalOldBal = 0;
                }
            }
        }
        private void SetOldPart()
        {
            loadPartialPay = new PartialPaymentCollection();
            loadPartialPay.LoadOldPartWithStdIdFromDb(Int32.Parse(LoginUser.stdLogStudentId));

            foreach (var popOld in loadPartialPay.pubOtherFeesCollect)
            {
                totalOldBal = totalOldBal + popOld.PartPay_Balance;
                billId      = popOld.PartPay_Bill_Id;
                stdId       = popOld.PartPay_Std_Id;
            }
            myOldCollect = new OldTuitionCollection();
            myOldCollect.LoadOldTuitionFromDb();
            if (myOldCollect.pubOldCollect.All(x => (x.OldTuition_Bill_Id != billId && x.OldTuition_Std_Id != stdId)))
            {
                if (totalOldBal != 0)
                {
                    InsertToOldTable();
                    totalOldBal = 0;
                }
            }
        }