PurplePen.XmlFileFormatException.CreateMessage C# (CSharp) Method

        static string CreateMessage(string filename, XmlTextReader xmlreader, string message, params object[] arguments)
        {
            if (filename != null && xmlreader != null) {
                return string.Format("File format error in file '{0}'\r\nat line {1}, column {2}:\r\n{3}",
                    filename, xmlreader.LineNumber, xmlreader.LinePosition,
                    string.Format(message, arguments));
            }
            else {
                return string.Format(message, arguments);
            }
        }