Hi.. I now get Message = "json.field.missing:#/lists/82/id: Property is required but not found.\r\n" This is what I'm doing. ContactList contactList = new ContactList(); contactList.Name = "TEST" contactList.Status = "ACTIVE"; contact = GetContactByEmailAddress(dr["EMAIL"].ToString().Trim()); // Add to new List contact.Lists.Add(contactList); result = _constantContact.UpdateContact(contact, false); any ideas? thx
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