private static void AddListSubscription(Guid listId, IXdbContext client, Contact contact) { if (listId != Guid.Empty) { client.SetListSubscriptions(contact, new ListSubscriptions() { Subscriptions = new List <ContactListSubscription>() { // 9.1 only //new ContactListSubscription(DateTime.UtcNow, true, listId) //{ // SourceDefinitionId = KnownIdentifiers.EmailExperienceManagerSubscriptionId //} } }); } }