How to enumerate an enum

Question

How can you enumerate an enum in C#?

E.g. the following code does not compile:

public enum Suit
{         


        

Answer 1

I think this is more efficient than other suggestions because GetValues() is not called each time you have a loop. It is also more concise. And you get a compile-time error, not a runtime exception if Suit is not an enum.

EnumLoop.ForEach((suit) => {
    DoSomethingWith(suit);
});

EnumLoop has this completely generic definition:

class EnumLoop where Key : struct, IConvertible {
    static readonly Key[] arr = (Key[])Enum.GetValues(typeof(Key));
    static internal void ForEach(Action act) {
        for (int i = 0; i < arr.Length; i++) {
            act(arr[i]);
        }
    }
}