System.Xml.XmlConvert.TryVerifyNormalizedString C# (CSharp) Метод

        internal static Exception TryVerifyNormalizedString(string str)
        {
            if (str.IndexOfAny(crt) != -1)
            {
                return new XmlSchemaException(SR.Sch_NotNormalizedString, str);
            }
            return null;
        }