如和调用这个函数private void logger(String msg)，在线等，急

Question

什么是msg,            string msg=null;
            string logUri=null;            WriteSystemLog(msg, logUri);private void logger(String msg)
        {
            string filePath = LogPath + "\\" + DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString();
            string fileName = filePath + "\\" + DateTime.Now.Day.ToString() + ".Log";
            if (!System.IO.Directory.Exists(LogPath))
            {
                System.IO.Directory.CreateDirectory(filePath);
            }
            FileStream filestream = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None);
            StreamWriter writer = new StreamWriter(filestream, System.Text.Encoding.Default);
            writer.BaseStream.Seek(0, SeekOrigin.End);
            writer.WriteLine("{0} {1}", DateTime.Now.TimeOfDay , msg);
            writer.Flush();
            writer.Close();
            filestream.Close();
        }有错误，想生成日志文件，多谢

Answer 1

msg在这里是一个string的变量名。有什么错误？

Answer 2

try
{
//do somthing
}
catch(Exception ex)
{
logger(ex.Message);
}