Adf.Base.Validation.NotInPastAttribute.IsValid C# (CSharp) 메소드

        public ValidationResult IsValid(PropertyInfo propertyToValidate, object value)
        {
            if (!(value is DateTime)) throw new ArgumentException("value for NotInPastAttribute is not a DateTime");

            return !(Convert.ToDateTime(value.ToString()) >= DateTime.Now)
                ? ValidationResult.CreateError(propertyToValidate, "Adf.Business.AttributeNotInPastInvalid", propertyToValidate.Name)
                : ValidationResult.Success;
        }