public BillStatus(BillStatusKind status, DateTime date)
     : this(status, date, string.Empty)
 {
 }
 public BillStatus(BillStatusKind status, DateTime date, string text)
 {
     Status     = status;
     StatusDate = date;
     StatusText = text;
 }
 public BillStatus(BillStatusKind status)
     : this(status, DateTime.MinValue)
 {
 }