public decimal GetBill()
{
decimal drinkBill = DrinkOrders.Sum(x => x.Price);
decimal foodBill = FoodOrders.Sum(x => x.Price);
decimal totalBill = drinkBill + foodBill;
return(totalBill);
}
public decimal GetBill()
{
return(FoodOrders.Sum(x => x.Price) + DrinkOrders.Sum(x => x.Price) + Price);
}