Debug.Listeners Property


Gets the collection of listeners that is monitoring the debug output.

 static property System::Diagnostics::TraceListenerCollection ^ Listeners { System::Diagnostics::TraceListenerCollection ^ get(); };
public static System.Diagnostics.TraceListenerCollection Listeners { get; }
member this.Listeners : System.Diagnostics.TraceListenerCollection
Public Shared ReadOnly Property Listeners As TraceListenerCollection

Property Value

A TraceListenerCollection representing a collection of type TraceListener that monitors the debug output.


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.
#if defined(DEBUG)
TextWriterTraceListener^ myWriter = 
   gcnew 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 

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


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.


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.


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

Applies to

See also