Write Log File C#

// Create a writer and open the file:

            StreamWriter log;

            if (!File.Exists("logfile.txt"))

            {

                log = new StreamWriter("logfile.txt");

            }

            else

            {

                log = File.AppendText("logfile.txt");

            }

            // Write to the file:

            log.WriteLine(DateTime.Now);

            log.WriteLine(strLogText);

            log.WriteLine();

            // Close the stream:

            log.Close();