Assembly: System (in system.dll)
The counter is read-only, so the application cannot increment it.
The instance is not correctly associated with a performance counter.
An error occurred when accessing a system API.
The platform is Windows 98 or Windows Millennium Edition (Me), which does not support performance counters.
You can write only to custom counters. All system counters are read-only.
The Increment, IncrementBy, and Decrement methods use interlocks to update the counter value. This helps keep the counter value accurate in multithreaded or multiprocess scenarios, but also results in a performance penalty. If you do not need the accuracy that interlocked operations provide, you can update the RawValue property directly for up to a 5 times performance improvement. However, in multithreaded scenarios, some updates to the counter value might be ignored, resulting in inaccurate data.
If the value for the InstanceLifetime property is Process and the performance counter category was created with .NET Framework version 1.0 or 1.1, an InvalidOperationException is thrown. Performance counter categories created with earlier versions use global shared memory, and the value for InstanceLifetime must be Global. If the category is not used by applications running on versions 1.0 or 1.1 of the .NET Framework, delete and recreate the category.
- PerformanceCounterPermission for reading the performance counter category if the ReadOnly property is true. Associated enumeration: PerformanceCounterPermissionAccess.Read.
- PerformanceCounterPermission for writing the performance counter category if the ReadOnly property is false. Associated enumeration: PerformanceCounterPermissionAccess.Write.
Windows 98, Windows 2000 SP4, 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.