CultureListAttribute Class
Declares that the value travels on the wire as a space-separated list of BCP 47 language tags
while the model exposes it as an array of cultures — e.g. the OIDC ui_locales and
claims_locales parameters. Purely semantic: it names the wire format and leaves
the parsing mechanism to the transport layer.
public class CultureListAttribute : System.AttributeInheritance System.Object → System.Attribute → CultureListAttribute