private void btn_DinnerMenu_Click(object sender, EventArgs e)
{
this.Hide();
OrderMenuUI orderMenuUI = new OrderMenuUI(order, this, "Dinner");
orderMenuUI.ShowDialog();
}
private void Btn_BeverageMenu_Click(object sender, EventArgs e)
{
this.Hide();
OrderMenuUI orderMenuUI = new OrderMenuUI(order, this, "Drinks");
orderMenuUI.ShowDialog();
}