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.NET Framework 4.5

.NET Framework Class Library

System.Diagnostics Namespaces

System.Diagnostics

BooleanSwitch Class

ConditionalAttribute Class

ConsoleTraceListener Class

CorrelationManager Class

CounterCreationData Class

CounterCreationDataCollection Class

CounterSample Structure

CounterSampleCalculator Class

DataReceivedEventArgs Class

DataReceivedEventHandler Delegate

Debug Class

DebuggableAttribute Class

DebuggableAttribute.DebuggingModes Enumeration

DebuggerBrowsableAttribute Class

DebuggerBrowsableState Enumeration

DebuggerDisplayAttribute Class

DebuggerHiddenAttribute Class

DebuggerNonUserCodeAttribute Class

DebuggerStepperBoundaryAttribute Class

DebuggerStepThroughAttribute Class

DebuggerTypeProxyAttribute Class

DebuggerVisualizerAttribute Class

DefaultTraceListener Class

DelimitedListTraceListener Class

DiagnosticsConfigurationHandler Class

EntryWrittenEventArgs Class

EntryWrittenEventHandler Delegate

EventInstance Class

EventLogEntry Class

EventLogEntryCollection Class

EventLogEntryType Enumeration

EventLogInstaller Class

EventLogPermission Class

EventLogPermissionAccess Enumeration

EventLogPermissionAttribute Class

EventLogPermissionEntry Class

EventLogPermissionEntryCollection Class

EventLogTraceListener Class

EventSchemaTraceListener Class

EventSourceCreationData Class

EventTypeFilter Class

FileVersionInfo Class

ICollectData Interface

InstanceData Class

InstanceDataCollection Class

InstanceDataCollectionCollection Class

MonitoringDescriptionAttribute Class

OverflowAction Enumeration

PerformanceCounter Class

PerformanceCounterCategory Class

PerformanceCounterCategoryType Enumeration

PerformanceCounterInstaller Class

PerformanceCounterInstanceLifetime Enumeration

PerformanceCounterManager Class

PerformanceCounterPermission Class

PerformanceCounterPermissionAccess Enumeration

PerformanceCounterPermissionAttribute Class

PerformanceCounterPermissionEntry Class

PerformanceCounterPermissionEntryCollection Class

PerformanceCounterType Enumeration

PresentationTraceLevel Enumeration

PresentationTraceSources Class

Process Class

ProcessModule Class

ProcessModuleCollection Class

ProcessPriorityClass Enumeration

ProcessStartInfo Class

ProcessThread Class

ProcessThreadCollection Class

ProcessWindowStyle Enumeration

SourceFilter Class

SourceLevels Enumeration

SourceSwitch Class

StackFrame Class

StackTrace Class

Stopwatch Class

Switch Class

SwitchAttribute Class

SwitchLevelAttribute Class

TextWriterTraceListener Class

ThreadPriorityLevel Enumeration

ThreadState Enumeration

ThreadWaitReason Enumeration

Trace Class

TraceEventCache Class

TraceEventType Enumeration

TraceFilter Class

TraceLevel Enumeration

TraceListener Class

TraceListenerCollection Class

TraceLogRetentionOption Enumeration

TraceOptions Enumeration

TraceSource Class

TraceSwitch Class

UnescapedXmlDiagnosticData Class

XmlWriterTraceListener Class

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PerformanceCounterCategoryType Enumeration

.NET Framework 4.5

Indicates whether the performance counter category can have multiple instances.

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

public enum PerformanceCounterCategoryType

	Member name	Description
	MultiInstance	The performance counter category can have multiple instances.
	SingleInstance	The performance counter category can have only a single instance.
	Unknown	The instance functionality for the performance counter category is unknown.

There are two types of performance counter categories: single-instance and multi-instance. By default, a category is single-instance when it is created and becomes multi-instance when another instance is added. Categories are created when an application is set up, and instances are added at run time. In the .NET Framework version 1.0 and version 1.1, it is not necessary to know whether a performance counter category is multi-instance or single-instance. In the .NET Framework version 2.0, the PerformanceCounterCategoryType enumeration is used to indicate whether a performance counter can have multiple instances.

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

Reference

System.Diagnostics Namespace

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