This documentation is archived and is not being maintained.

TraceListener.WriteLine Method (Object, String)

Writes a category name and the value of the object's ToString method to the listener you create when you implement the TraceListener class, followed by a line terminator.

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

public virtual void WriteLine (
	Object o,
	string category
public void WriteLine (
	Object o, 
	String category
public function WriteLine (
	o : Object, 
	category : String



An Object whose fully qualified class name you want to write.


A category name used to organize the output.

The typical line terminator you might implement is a carriage return followed by a line feed (\r\n).

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0