private static EmailMessage CreateMessage(string subject,
                                           MessageBody body,
                                           EmailAddress sender,
                                           IEnumerable <EmailAddress> recipients)
 => new EmailMessage(subject, body, sender, recipients);
 public static EmailMessage CreatePending(string subject,
                                          MessageBody body,
                                          EmailAddress sender,
                                          IEnumerable <EmailAddress> recipients)
 => CreateMessage(subject, body, sender, recipients);