Consistent use of "None" in flags enumerations indicates that all flag values are cleared. The value 0 should not be used to indicate any other state, since there is no way to check that the bit 0 is set.

Noncompliant Code Example

<Flags()>
Enum FruitType
    Void = 0        ' Non-Compliant
    Banana = 1
    Orange = 2
    Strawberry = 4
End Enum

Compliant Solution

<Flags()>
Enum FruitType
    None = 0        ' Compliant
    Banana = 1
    Orange = 2
    Strawberry = 4
End Enum