System.Xml.XmlConvert.TryVerifyNMTOKEN C# (CSharp) Method

        internal static Exception TryVerifyNMTOKEN(string name)
        {
            if (name == null || name.Length == 0)
            {
                return new XmlException(SR.Xml_EmptyName, string.Empty);
            }
            int endPos = ValidateNames.ParseNmtokenNoNamespaces(name, 0);
            if (endPos != name.Length)
            {
                return new XmlException(SR.Xml_BadNameChar, XmlException.BuildCharExceptionArgs(name, endPos));
            }
            return null;
        }