Question

public enum sEnum
{
    zero = 0, one = 1
}

public int x;

public static void a(sEnum s)
{
    x = 3;
    if (s == sEnum.one) ...
}

Why can values of the enum be checked here, as the static keyword isn’t used? Where is this documented in the language specification?

Answer 1

Enums are just named values so you can use them in a static context just like any other constant.

Section 3.4.3 of the language specification states:

The members of an enumeration are the constants declared in the enumeration