TraceSource.TraceSource(String, SourceLevels) Constructor

Initializes a new instance of the TraceSource class, using the specified name for the source and the default source level at which tracing is to occur.

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

public TraceSource (
	string name,
	SourceLevels defaultLevel
public TraceSource (
	String name, 
	SourceLevels defaultLevel
public function TraceSource (
	name : String, 
	defaultLevel : SourceLevels
Not applicable.



The name of the source, typically the name of the application.


A bitwise combination of the SourceLevels values that specifies the default source level at which to trace.

Exception typeCondition


name is a null reference (Nothing in Visual Basic).


name is an empty string ("").

The source name is used to identify traces. It can be used by a SourceSwitch to determine if tracing is to occur and by a SourceFilter to determine whether to produce the trace. The default source level is used by an EventTypeFilter to determine if tracing is to occur based on the source level of the message to be traced.


It is not necessary to create a new TraceSource instance for each trace request. Create one TraceSource instance and use it for all trace requests for the application.

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

Community Additions