TraceListenerCollection.Add(TraceListener) Method

Reference

Definition

Namespace:: System.Diagnostics

Assemblies:: netstandard.dll, System.Diagnostics.TraceSource.dll

Assembly:: System.Diagnostics.TraceSource.dll

Assembly:: System.dll

Assembly:: netstandard.dll

Source:: TraceListeners.cs

Source:: TraceListeners.cs

Source:: TraceListeners.cs

Important

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Adds a TraceListener to the list.

public:
 int Add(System::Diagnostics::TraceListener ^ listener);

public int Add(System.Diagnostics.TraceListener listener);

member this.Add : System.Diagnostics.TraceListener -> int

Public Function Add (listener As TraceListener) As Integer

Parameters

listener: TraceListener

A TraceListener to add to the list.

Returns

Int32

The position at which the new listener was inserted.

Examples

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

/* Create a listener, which outputs to the console screen, and 
 * add it to the trace listeners. */
TextWriterTraceListener^ myWriter = gcnew TextWriterTraceListener;
myWriter->Writer = System::Console::Out;
Trace::Listeners->Add( myWriter );

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

' Create a listener, which outputs to the console screen, and
' add it to the trace listeners. 
Dim myWriter As New TextWriterTraceListener()
myWriter.Writer = System.Console.Out
Trace.Listeners.Add(myWriter)

Applies to

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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