Unsetting an enum flag

Question

Consider

   [Flags]    public enum State    {       IsCool = 0x1,       SomethingElse = 0x2    } 

I have a State someState and if some expression evaluates to true, I want to unset the IsCool flag of someState regardless of it being already set or unset. This means that I can't really use someState ^= State.IsCool but what can I use instead?

Answer 1

You need to approach this the reverse way than when setting a flag: bitwise AND the current state with the complement of the flag you want to remove.

someState &= ~State.IsCool;