static void Main(string[] args)
{
var espresso = new Espresso();
Console.WriteLine($"{espresso.AsString()} costs {espresso.Cost()} $");
var espressoWithMilk = new WithMilk(espresso);
Console.WriteLine($"{espressoWithMilk.AsString()} costs {espressoWithMilk.Cost()} $");
var espressoWithMilkAndSugar = new WithSugar(espressoWithMilk);
Console.WriteLine($"{espressoWithMilkAndSugar.AsString()} costs {espressoWithMilkAndSugar.Cost()} $");
Console.ReadKey();
}