Csharp/C Sharp by API/System.Diagnostics/TextWriterTraceListener

new TextWriterTraceListener(String fileName)

  
#define DEBUG
using System;
using System.Globalization;
using System.Diagnostics;
class MainClass
{
  public static void Main() 
  {
    TextWriterTraceListener tl = new TextWriterTraceListener("Example21_12.txt");
    Debug.Listeners.Add(tl);
    
    EventLogTraceListener t2 = new EventLogTraceListener("Application");
    Debug.Listeners.Add(t2);
    Debug.WriteLine("Starting Main()");
    Debug.Assert(1 == 2, "1 ==2");
    Debug.WriteLine("Exiting Main()");
    Debug.Flush();
    Debug.Close();
  }
}