public static void Main()
{
Sandwich veggie = new VeggieSandwich();
Console.WriteLine(veggie.GetPrice());
Console.WriteLine(veggie.GetDescription());
var veggieCheese = new Cheese(veggie);
Console.WriteLine(veggieCheese.GetPrice());
Console.WriteLine(veggieCheese.GetDescription());
var veggieCheeseCorn = new Corn(veggieCheese);
Console.WriteLine(veggieCheeseCorn.GetPrice());
Console.WriteLine(veggieCheeseCorn.GetDescription());
var tuna = new Corn(new Olives(new TunaSandwich()));
Console.WriteLine(tuna.GetPrice());
Console.WriteLine(tuna.GetDescription());
}