Can't output Debug.WriteLine("test")

Question

I wrote following code

Debug.Listeners.Add(new TextWriterTraceListener(Console.Out));
Debug.AutoFlush = true;
Debug.Indent();
Debug.WriteLine("test");

Nothing is output in output window What's wrong?

Answer 1

Possible causes that I can think of:

1. Do you compile the application in DEBUG mode?
2. Do you run the application while debugging? Visual Studio has to listen to the application, and this is done when you are debugging the application.
3. Do you configure somewhere debug listeners?

Answer 2

I use debug output in a slightly different way to your example:

        Trace.Listeners.Clear();
        DefaultTraceListener listener = new DefaultTraceListener();
        Trace.Listeners.Add(listener);
        Debugger.Log(1, "test", "oops i've crashed");

The debug output does go to the output window. Make sure that you are running as "debug" and not "release"

Answer 3

Also worth checking: right-click in the output window, and ensure "Program output" is checked.