Enum can take Flags as attribute and perform bit operations over the numerics(Values must be power of two).
[Flags] public enum Color { Red=1,-->0001 Yellow=2,--->0010 Green=4--->0100 } var combination = Color.Red | Color.Green; Console.WriteLine(combination); /* Red,Green*/
They are helpful when you need to hold multiple values/Combination of values defined in an Enum.