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TextWriterTraceListener.TextWriterTraceListener(Stream) Constructor

Initializes a new instance of the TextWriterTraceListener class, using the stream as the recipient of the debugging and tracing output.

Namespace: System.Diagnostics
Assembly: System (in system.dll)

public TextWriterTraceListener (
	Stream stream
public TextWriterTraceListener (
	Stream stream
public function TextWriterTraceListener (
	stream : Stream
Not applicable.



A Stream that represents the stream the TextWriterTraceListener writes to.

Exception typeCondition


The stream is a null reference (Nothing in Visual Basic).

This constructor initializes the Name property to an empty string ("").

The following code example creates a TextWriterTraceListener using the TextWriterTraceListener(Stream) constructor and adds it to the TraceListenerCollection. The example then writes two messages to this TextWriterTraceListener, and writes a message to all TraceListener objects in the TraceListenerCollection. Finally, it flushes and closes the TextWriterTraceListener.

using System;
using System.Diagnostics;
using System.IO;
using Microsoft.VisualBasic;

class TWTLConStreamMod

    // args(0) is the specification of the trace log file.
    public static void Main(string[] args)

        // Verify that a parameter was entered.
        if (args.Length==0)
            Console.WriteLine("Enter a trace file specification.");

            // Create a stream object.
            FileStream traceStream;
                traceStream = new FileStream(args[0], FileMode.Append, FileAccess.Write);
            catch(Exception ex)
                Console.WriteLine("Error creating FileStream for trace file \"{0}\":" +
                    "\r\n{1}", args[0], ex.Message);

            // Create a TextWriterTraceListener object that takes a stream.
            TextWriterTraceListener textListener;
            textListener = new TextWriterTraceListener(traceStream);

            // Write these messages only to this TextWriterTraceListener.
            textListener.WriteLine("This is trace listener named \""+ textListener.Name+"\"");
            textListener.WriteLine("Trace written through a stream to: " +
                "\r\n    \""+args[0]+"\"");

            // Write a message to all trace listeners.
            Trace.WriteLine(String.Format("This trace message written {0} to all listeners.", DateTime.Now));

            // Flush and close the output.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

XNA Framework

Supported in: 1.0