BoC.EventAggregator.BaseEvent.Contains C# (CSharp) Method

        public virtual bool Contains(SubscriptionToken token)
        {
            using (Profiler.StartContext("{0}.Contains()", this.GetType()))
            {
                lock (_subscriptions)
                {
                    IEventSubscription subscription =
                        _subscriptions.FirstOrDefault(evt => evt.SubscriptionToken == token);

                    return (subscription != null);
                }
            }
        }