Combining Enum Values with Bit-Flags

Question

I have this scenario where user has its role

NormalUser
Custodian
Finance

both Custodian and Finance is a Super

Answer 1

Check out What does the [Flags] Enum Attribute mean in C#? for a more thorough explanation.

A "safer" way to declare flags is to use bit-shifting to ensure there's no overlap (as mentioned by @DaveOwen's answer) without figuring out the math yourself:

[Flags]
public enum MyEnum
{
    None   = 0,
    First  = 1 << 0,
    Second = 1 << 1,
    Third  = 1 << 2,
    Fourth = 1 << 3
}

There's also Enum.HasFlag (possibly newer .NET than OP) for checking, rather than Expected & Testing == Expected