Zau_Class Containing List (Bank Account)

namespace Zau_Class_Containing_List_BankAccount
{

    public class Account
    {
        //Private fields
        private string _accountNumber;
        private decimal _balance;
        private string _name;

        //Constructor
        public Account(string accountNumber, decimal balance, string name)
        {
            _accountNumber = accountNumber;
            _balance = balance;
            _name = name;
        }

        //Properties
        public string AccountNumber
        { get { return _accountNumber; } }
        public decimal Balance
        { get { return _balance; } }
        public string Name
        { get { return _name; } }

        public void AddAmount(decimal amt)
        {
            _balance += amt;
        }

        public void SubAmount(decimal amt)
        {
            _balance -= amt;
        }
    }
}
//==================================================
namespace Zau_Class_Containing_List_BankAccount
{
    public partial class Form1 : Form
    {
        List<Account> accountList = new List<Account>();
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Account account = new Account("1001", 3490.35m, "Zau Bawk");
            accountList.Add(account);
            account = new Account("1002", 1571.00m, "David");
            accountList.Add(account);
            account = new Account("1003", 2547.01m, "Grace");
            accountList.Add(account);
            account = new Account("1004", 8271.35m, "Sut Ring");
            accountList.Add(account);
            account = new Account("1005", 3490.35m, "Mary");
            accountList.Add(account);
        }

        private void btnDisplayAccountlist_Click(object sender, EventArgs e)
        {
            DisplayAccounts();
        }
        private void DisplayAccounts()
        {
            listView1.Items.Clear();

            foreach (Account account in accountList)
            {
                ListViewItem lvi = new ListViewItem(account.AccountNumber);
                lvi.SubItems.Add(account.Balance.ToString("c"));
                lvi.SubItems.Add(account.Name);

                listView1.Items.Add(lvi);
            }
        }

        private void btnGetUserAccount_Click(object sender, EventArgs e)
        {
            listView1.Items.Clear();
            //get account id
            string accountID = txtAccountID.Text;
            //get account object with the specified accountID
            Account account = GetAccountById(accountID);
            if (account != null)
            {
                ListViewItem lvi = new ListViewItem(account.AccountNumber);
                lvi.SubItems.Add(account.Balance.ToString("c"));
                lvi.SubItems.Add(account.Name);

                listView1.Items.Add(lvi);
            }
        }
        private Account GetAccountById(string accountID)
        {
            ///sequence through the courseList and search /return the course object 
            ///with the given ID
            listView1.Items.Clear();
            foreach (Account account in accountList)
            {
                if (account.AccountNumber == accountID)
                    return account;
            }
            //if the code gets to this point, means that 
            //such course has not been found
            return null;
        }

        private void btnDeposit_Click(object sender, EventArgs e)
        {
            listView1.Items.Clear();
            //get account id
            string accountID = txtAccountNum.Text;
            //get account object with the specified accountID
            Account account = GetAccountById(accountID);

            decimal amt;
            if (decimal.TryParse(txtAmount.Text, out amt))

                if (account != null)
                {
                    account.AddAmount(amt);
                    //display 
                    ListViewItem lvi = new ListViewItem(account.AccountNumber);
                    lvi.SubItems.Add(account.Balance.ToString("c"));
                    lvi.SubItems.Add(account.Name);

                    listView1.Items.Add(lvi);
                }
        }

        private void btnWithdrawal_Click(object sender, EventArgs e)
        {
            listView1.Items.Clear();
            //get account id
            string accountID = txtAccountNum.Text;
            //get account object with the specified accountID
            Account account = GetAccountById(accountID);

            decimal amt;
            if (decimal.TryParse(txtAmount.Text, out amt))

                if (account != null)
                {
                    account.SubAmount(amt);
                    //display 
                    ListViewItem lvi = new ListViewItem(account.AccountNumber);
                    lvi.SubItems.Add(account.Balance.ToString("c"));
                    lvi.SubItems.Add(account.Name);

                    listView1.Items.Add(lvi);
                }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Close();
        }
    }
}
    //ASSIGNMENT: MAY 06
    ///DEFINE A CLASS Account with fields: _accountNumber,
    ///                                    _balance
    ///                                    _name (of owner)
    ///                                    
    ///Add constructor, properties.
    ///Define methods:
    ///             Deposit(decimal amount) that adds to the balance
    ///             Withdraw(decimal amount) that subtract from the balance
    ///  
    ///In form1: define a List of Account objects
    ///In form1 load: Add 5 accounts to the list
    ///Provide gui to display all the accounts
    ///Add method GetAccountById(string accountNumber)
    ///Provide gui for the user to enter accountNumber, enter
    ///amount to deposit or withdraw and buttons to either
    ///deposit the amount or withdraw the amount from the account