private static void Main()
{
GuitarComponent regularOrder = new RegularOrder("Cort", 2000);
Console.WriteLine(regularOrder.CalculateTotalOrderPrice());
GuitarComponent preorder = new Preorder("Fender", 2300);
Console.WriteLine(preorder.CalculateTotalOrderPrice());
Console.WriteLine();
// As we can see, with the premiumPreorder object we are wrapping the preorder object to which we add an additional behavior.
GuitarComponent premium = new PremiumPreorder(preorder);
GuitarComponent premium2 = new PremiumPreorder(premium);
Console.WriteLine(premium.CalculateTotalOrderPrice());
Console.WriteLine(premium.Operation());
Console.WriteLine();
Console.WriteLine(premium2.CalculateTotalOrderPrice());
Console.WriteLine(premium2.Operation());
}