Decorator (CoffeeDecorator): ○ The CoffeeDecorator class is an abstract class that implements the ICoffee interface and holds a reference to an ICoffee object. This class

llows us to add additional behavior to the coffee object, but we don't modify

the base class (SimpleCoffee).

public abstract class CoffeeDecorator : ICoffee
{

protected ICoffee _coffee;

protected CoffeeDecorator(ICoffee coffee) => _coffee = coffee;
public virtual double Cost() => _coffee.Cost();
public virtual string Description() => _coffee.Description();
}