public void inviteEmailAddress(ContactItem contact, String type) { try { ContactApi contactApi = new ContactApi(session.GetApiClient()); InviteEmailAddressInput input = new InviteEmailAddressInput(type, true, contact.Email, "Invitation message"); InviteEmailAddressResult result = contactApi.InviteEmailAddress(input); if (result.Hdr.Rc != 0) { throw new Exception("Error while inviting email address"); } } catch (Exception ex) { throw new Exception("Error while inviting email address", ex); } }