TraceSource Constructor (String, SourceLevels)
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TraceSource Constructor (String, SourceLevels)

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 Sub New ( _
	name As String, _
	defaultLevel As SourceLevels _


Type: System.String
The name of the source, typically the name of the application.
Type: System.Diagnostics.SourceLevels
A bitwise combination of the enumeration values that specifies the default source level at which to trace.


name is Nothing.


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.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

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