private void SubmitPayment()
        {
            ParentInfoDB parentInfoDB = new ParentInfoDB();
            Double       num;

            if (Double.TryParse(txt_PaymentAmount.Text, out num))
            {
                if (num.ToString().Contains('.'))
                {
                    if (num.ToString().Split('.')[1].Length < 3)
                    {
                        parentInfoDB.UpdateCurBalance(this.guardianID, num);

                        this.callingWindow.UpdateCurDue(this.guardianID);
                        this.Close();
                    }
                    else
                    {
                        MessageBox.Show("You must enter a valid dollar number in the Payment Amount box.");
                    }
                }
                else
                {
                    parentInfoDB.UpdateCurBalance(this.guardianID, num);

                    this.callingWindow.UpdateCurDue(this.guardianID);
                    this.Close();
                }
            }
            else
            {
                MessageBox.Show("You must enter a valid dollar number in the Payment Amount box.");
            }
        }
        private void InitializeCurrentBalance()
        {
            ParentInfoDB parentInfoDB = new ParentInfoDB();

            lbl_CurrentBalance.Content += " " + parentInfoDB.GetCurrentDue(guardianID);
        }