System.Xml.Xsl.XslLoadException.AppendLineInfoMessage C# (CSharp) Méthode

        private static string AppendLineInfoMessage(string message, ISourceLineInfo lineInfo)
        {
            if (lineInfo != null)
            {
                string fileName = SourceLineInfo.GetFileName(lineInfo.Uri);
                string lineInfoMessage = CreateMessage(SR.Xml_ErrorFilePosition, fileName, lineInfo.Start.Line.ToString(CultureInfo.InvariantCulture), lineInfo.Start.Pos.ToString(CultureInfo.InvariantCulture));
                if (lineInfoMessage != null && lineInfoMessage.Length > 0)
                {
                    if (message.Length > 0 && !XmlCharType.Instance.IsWhiteSpace(message[message.Length - 1]))
                    {
                        message += " ";
                    }
                    message += lineInfoMessage;
                }
            }
            return message;
        }