Control CPU or GPU performance levels of the device. Can be null if the subsystem does not support controlling CPU/GPU performance levels. Is null when the Feature.PerformanceLevelControl bit is not set in AdaptivePerformanceSubsystemBase<TSubsystem, TSubsystemDescriptor, TProvider>.Capabilities. The returned reference does not change after startup.

public abstract IDevicePerformanceLevelControl PerformanceLevelControl { get; }