EnableMeasurement()

object System.Diagnostics.Metrics.Instrument< T >.EnableMeasurement ( ListenerSubscription subscription, out bool oldStateStored )

inlinepackageinherited

Definition at line 83 of file Instrument.cs.

    {
        oldStateStored = false;
        if (!_subscriptions.AddIfNotExist(subscription, (ListenerSubscription s1, ListenerSubscription s2) => s1.Listener == s2.Listener))
        {
            ListenerSubscription listenerSubscription = _subscriptions.Remove(subscription, (ListenerSubscription s1, ListenerSubscription s2) => s1.Listener == s2.Listener);
            _subscriptions.AddIfNotExist(subscription, (ListenerSubscription s1, ListenerSubscription s2) => s1.Listener == s2.Listener);
            oldStateStored = listenerSubscription.Listener == subscription.Listener;
            return listenerSubscription.State;
        }
        return false;
    }

References System.Diagnostics.Metrics.Instrument< T >._subscriptions, and System.Collections.Generic.Dictionary< TKey, TValue >.Remove().