shutdown mdr

 protected void Shutdown_Click(object sender, EventArgs e)
    {
        //retrieving bank from the session
        Bank BankSys1 = (Bank)Session["Bank"];
        string pin = (string)Session["pin"];

        //for each loop to insert all Customers accounts in the customers accounts dictionary into the database

        DAL = new DAL2();

        //loop through each each customer
        foreach (KeyValuePair<string, Customer> kvp in BankSys1.getcustomerData())
        {
            c = kvp.Value;
            //loop through cust account
            foreach (KeyValuePair<string, Account> kvp1 in c.getAccounts())
            {
                //run update acc from the DAL
                DAL.updateAccountData(kvp1.Value);

            }
        }
        //setting the session variables to null due to system shutdown
        Session["Bank"] = null;
        Session["pin"] = null;
        Session["login"] = null;

        //Abandoning session and redirecting user the index
        Session.Abandon();
        Response.Redirect("..\\Index.aspx");
    }