System.Xml.XmlConvert.TryVerifyTOKEN C# (CSharp) Méthode

        internal static Exception TryVerifyTOKEN(string token)
        {
            if (token == null || token.Length == 0)
            {
                return null;
            }
            if (token[0] == ' ' || token[token.Length - 1] == ' ' || token.IndexOfAny(crt) != -1 || token.IndexOf("  ", StringComparison.Ordinal) != -1)
            {
                return new XmlException(SR.Sch_NotTokenString, token);
            }
            return null;
        }