How to get next (or previous) enum value in C#

Question

I have an enum which is defined like this:

public enum eRat { A = 0, B=3, C=5, D=8 };

So given value eRat.B, I want to get the

Answer 1

Judging from your description, you don't really want an enum. You're stretching enum beyond its capabilities. Why not create a custom class that exposes the values you need as properties, while keeping them in OrderedDictionary. Then getting a next/previous one would be trivial. --update

If you want to enumerate differently on the collection based in the context, make that explicit part of your design. Encapsulate the items within a class, and have few methods each returning IEnumerable where, T is your desired type.

For example

IEnumerable GetFoosByBar()
IEnumerable GetFoosByBaz()

etc...