private void buttonExit_Click(object sender, EventArgs e) { DialogResult result = MessageBox.Show("Do you want to exit the application?", "Exit", MessageBoxButtons.OKCancel, MessageBoxIcon.Information); if (result.Equals(DialogResult.OK)) { this.Hide(); FormListOfOrder formListOfOrder = new FormListOfOrder(); formListOfOrder.Show(); } else { listViewNewOrder.Items.Clear(); } }