How do you write code whose logic is protected against future additional enumerations?

Question

I\'m having a hard time describing this problem. Maybe that\'s why I\'m having a hard time finding a good solution (the words just aren\'t cooperating). Let me explain via cod

Answer 1

I would use types, not enums, for the data structures... E.G. Create an interface IFruit that has the following:

interface IFruit
{
     bool NeedsCoring();
     void GetEaten(Person by);
     // etc.
}

And then I would just call the methods already there for determining whether it needs to be cored or whatnot.