public Addressee(string recipient, NotificationAccountType recipientAccountType)
 {
     Recipients = List.Of(recipient);
     RecipientAccountType = recipientAccountType;
 }
 public Addressee(IEnumerable<string> recipients, NotificationAccountType recipientAccountType)
 {
     Recipients = recipients;
     RecipientAccountType = recipientAccountType;
 }
 public Addressee(string recipient, NotificationAccountType recipientAccountType,
     string copyToEmail)
     : this(recipient, recipientAccountType)
 {
     CopyToEmail = copyToEmail;
 }
 public Addressee(IEnumerable<string> recipients, NotificationAccountType recipientAccountType,
     string copyToEmai)
     : this(recipients, recipientAccountType)
 {
     CopyToEmail = copyToEmai;
 }