SmartGlassDevice.QosMetricsChanged Event

public:
event TypedEventHandler<SmartGlassDevice^ , QosMetricsChangedEventArgs^ >^ QosMetricsChanged {
         EventRegistrationToken add (TypedEventHandler<SmartGlassDevice^ , QosMetricsChangedEventArgs^ >^ value);
         void remove (EventRegistrationToken token);
}