/// <summary>
    /// In addition to descriptive message, application exceptions can contain machine-parseable codes
    /// </summary>
    public class ApplicationException : Exception
    {
        public ApplicationException()
        {
        }

        public ApplicationException(string message, int? code) : base(message)
        {
            Code = code;
        }

        public ApplicationException(string message, Exception innerException) : base(message, innerException)
        {
        }

        protected ApplicationException(SerializationInfo info, StreamingContext context) : base(info, context)
        {
        }

        public int? Code { get; set; }
    }