SIPSorcery.SimpleWizardOutRuleControl.Validate C# (CSharp) Method

        private string Validate(SimpleWizardRule rule)
        {
            var validationResults = new List<ValidationResult>();
            var validationContext = new ValidationContext(rule, null, null);
            Validator.TryValidateObject(rule, validationContext, validationResults);
            rule.ValidationErrors.Clear();

            if (validationResults.Count > 0)
            {
                return validationResults[0].ErrorMessage;
            }
            //else
            //{
            //    if (rule.RuleType == SimpleWizardRuleTypes.Regex)
            //    {
            //        try
            //        {
            //            new Regex(rule.Pattern);
            //        }
            //        catch(Exception excp)
            //        {
            //            return "The rule pattern was not recognised as a valid regular expression. " + excp.Message;
            //        }
            //    }
            //}

            return null;
        }