public static int Main(string[] args) {
    // Create a file for output named TestFile.txt.
    Stream myFile = File.Create("TestFile.txt");
 
    /* Create a new text writer using the output stream, and add it to
     * the trace listeners. */
    TextWriterTraceListener myTextListener = new 
       TextWriterTraceListener(myFile);
    Trace.Listeners.Add(myTextListener);
 
    /* Create a text writer that writes to the console screen, and add
     * it to the trace listeners */
    TextWriterTraceListener myWriter = new 
       TextWriterTraceListener(System.Console.Out);
    Trace.Listeners.Add(myWriter);
 
    // Write output to the file and to the console screen.
    Trace.Write("Test output ");
 
    // Write only to the console screen.
    myWriter.WriteLine("Write only to the console screen.");
 
    // Flush and close the output.
    Trace.Flush(); 
    myWriter.Flush();
    myWriter.Close();
 
    return  0 ;
 }