private void btnSnack_Sale_Click(object sender, EventArgs e)
        {
            this.Hide();
            Snack_Sale snack_Sale = new Snack_Sale();

            snack_Sale.ShowDialog();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            this.Hide();
            Snack_Sale Snack_Sale = new Snack_Sale();

            Snack_Sale.ShowDialog();
        }