title: problem in detecting logoff using c#
body: <p>I tried to detect logoff event and write it in a text.</p>
  
  <p>How can this be fixed? i wanted to write the logoff time in a text file but the text file is not created when i logoff the PC.</p>
  
  <pre><code>static void Main(string[] args)
  {
      SystemEvents.SessionSwitch += SystemEvents_SessionSwitch;
      Console.ReadLine();
      SystemEvents.SessionSwitch -= SystemEvents_SessionSwitch;
  }
  static void SystemEvents_SessionSwitch(object sender, SessionSwitchEventArgs e)
  {
      if (e.Reason == SessionSwitchReason.SessionLogoff)
      {
          TextWriter tw = new StreamWriter("D:\\date.txt");
          tw.WriteLine("logoff" + DateTime.Now);
          tw.Close();
      }
      if (e.Reason == SessionSwitchReason.SessionLogon)
      {
          TextWriter tw1 = new StreamWriter("D:\\date.txt");
          tw1.WriteLine("logoff" + DateTime.Now);
          tw1.Close();
      }
  }
  </code></pre>