public UniversalDateTime AddYears(int value)
        {
            var dt = DateTime.Parse(Value);

            dt = dt.AddYears(value);
            return(UniversalDateTime.Convert(dt.ToUniversalTime()));
        }
        public UniversalDateTime AddSeconds(double value)
        {
            var dt = DateTime.Parse(Value);

            dt = dt.AddSeconds(value);
            return(UniversalDateTime.Convert(dt.ToUniversalTime()));
        }
        public UniversalDateTime AddTicks(long value)
        {
            var dt = DateTime.Parse(Value);

            dt = dt.AddTicks(value);
            return(UniversalDateTime.Convert(dt.ToUniversalTime()));
        }
        public UniversalDateTime AddMonths(int months)
        {
            var dt = DateTime.Parse(Value);

            dt = dt.AddMonths(months);
            return(UniversalDateTime.Convert(dt.ToUniversalTime()));
        }