Chapter 80: Diagnostics

Section 80.1: Redirecting log output with TraceListeners

You can redirect the debug output to a text file by adding a TextWriterTraceListener to the Debug.Listeners collection.

public static void Main(string[] args)

{

TextWriterTraceListener myWriter = new TextWriterTraceListener(@"debug.txt"); Debug.Listeners.Add(myWriter);

Debug.WriteLine("Hello");

myWriter.Flush();

}

You can redirect the debug output to a console application's out stream using a ConsoleTraceListener.

public static void Main(string[] args)

{

ConsoleTraceListener myWriter = new ConsoleTraceListener(); Debug.Listeners.Add(myWriter);

Debug.WriteLine("Hello");

}

Section 80.2: Debug.WriteLine

Writes to the trace listeners in the Listeners collection when the application is compiled in debug configuration.

public static void Main(string[] args)

{

Debug.WriteLine("Hello");

}

In Visual Studio or Xamarin Studio this will appear in the Application Output window. This is due to the presence of the default trace listener in the TraceListenerCollection.