Do not mark enums with FlagsAttribute

An externally visible enumeration is marked by using FlagsAttribute, and it has one or more values that are not powers of two or a combination of the other defined values on the enumeration.

An enumeration is marked with System.FlagsAttribute and it has one or more values that are not powers of two or a combination of the other defined values on the enumeration.

By default, this rule only looks at externally visible enumerations, but this is configurable.

To fix a violation of this rule, remove System.FlagsAttribute from the enumeration.

Do not suppress a warning from this rule.