[Serializable()]
    public class PayerCodeNullOrEmptyException : Exception
    {
        public PayerCodeNullOrEmptyException() : base() { }
        public PayerCodeNullOrEmptyException(string message) : base(message) { }
        public PayerCodeNullOrEmptyException(string message, Exception innerException) : base(message, innerException) { }
        protected PayerCodeNullOrEmptyException(SerializationInfo info, StreamingContext ctx) : base(info, ctx) { }
    }