Plural names indicate that the values of the enumeration can be combined. For example, an enumeration named 'Day' indicates ...

Plural names indicate that the values of the enumeration can be combined. For example, an enumeration named 'Day' indicates a single day, and an enumeration named 'Days' indicates multiple days. Enumeration values should be combined using the bit-wise OR operator only if the Flags attribute is present on the enumeration.