System 2.0.0.0 4.0.0.0 System.Enum The default behavior is , which specifies the removal of the performance counter instance when no counters are using the process category. If the property is , the value for the performance counter must be . Specifies the lifetime of a performance counter instance. Field 2.0.0.0 4.0.0.0 System.Diagnostics.PerformanceCounterInstanceLifetime Remove the performance counter instance when no counters are using the process category. Field 2.0.0.0 4.0.0.0 System.Diagnostics.PerformanceCounterInstanceLifetime Remove the performance counter instance when the process is closed.