private void btnOpenAccount_Click(object sender, EventArgs e)
 {
     using (OpenAccount frmOpenAccount = new OpenAccount(txtFirstName.Text + " " + txtSurname.Text, currentCustomer.CustomerID))
     {
         frmOpenAccount.ShowDialog();
     }
 }
 private void btnOpenAccount_Click(object sender, EventArgs e)
 {
     using (OpenAccount frmOpenAccount = new OpenAccount(txtFirstName.Text + " " + txtSurname.Text, currentCustomer.CustomerID))
     {
         frmOpenAccount.ShowDialog();
     }
 }