... are set on an enum. For example, you could use the HasFlag() method to test whether a car has particular options set: [Flags] public enum CarOptions { AirCon = 1, Turbo = 2, MP3Player ... HTTP host header (this can be useful for testing load balancing scenarios to test connection to a particular server) Examples of these properties are as follows: string loadbalancerIp = "http://127.0.0.1/";...