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SwitchLevelAttribute Class

Identifies the level type for a switch.

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

public sealed class SwitchLevelAttribute : Attribute

This attribute is intended to be applied to all classes that inherit from the Switch class. The purpose of the attribute is to identify the type that specifies the switch criteria of the switch. Each switch determines whether a trace is to be written, based on whether an event type matches or exceeds the value of the SwitchLevelType property for the switch. The type used for the SwitchLevelType property varies for different switches. For example, the switch level type for the BooleanSwitch class is Boolean, and the switch level type for the TraceSwitch class is TraceLevel.


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0