The listeners produce formatted output from the debug output. By default, the collection contains an instance of the DefaultTraceListener class. To remove the default listener, call the Remove method, and pass it the instance of the DefaultTraceListener. To redirect output to the console window, add an instance of the ConsoleTraceListener. To redirect output to a file or stream, add an instance of the TextWriterTraceListener.

Note:
The Listeners collection is shared by both the Debug and the Trace classes; adding a trace listener to either class adds the listener to both.

The following example creates a TextWriterTraceListener that outputs to the console screen. The code then adds the new listener to the Listeners.

' Create a listener that outputs to the console screen, and 
' add it to the debug listeners. 
Dim myWriter As New TextWriterTraceListener(System.Console.Out)
Debug.Listeners.Add(myWriter)

/* Create a listener that outputs to the console screen, and 
  * add it to the debug listeners. */
 TextWriterTraceListener myWriter = new 
    TextWriterTraceListener(System.Console.Out);
 Debug.Listeners.Add(myWriter);

// Create a listener that outputs to the console screen 
// and add it to the debug listeners.
#if defined(DEBUG)
TextWriterTraceListener^ myWriter = 
   gcnew TextWriterTraceListener( System::Console::Out );
Debug::Listeners->Add( myWriter );
#endif

• SecurityPermission 

  for operating with unmanaged code. Demand value LinkDemand; associated enumeration: SecurityPermissionFlag..::.UnmanagedCode.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

.NET Framework

.NET Compact Framework

XNA Framework

Reference