Esempio n. 1
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        // Wrap event invocations inside a protected virtual method
        // to allow derived classes to override the event invocation behavior
        protected virtual void OnRaiseCustomEvent(EventInfo e)
        {
            // Make a temporary copy of the event to avoid possibility of
            // a race condition if the last subscriber unsubscribes
            // immediately after the null check and before the event is raised.
            EventHandler<EventInfo> handler = RaiseCustomEvent;

            // Event will be null if there are no subscribers
            if (handler != null)
            {
                // Format the string to send inside the CustomEventArgs parameter
                e.Message += String.Format(" at {0}", DateTime.Now.ToString());

                // Use the () operator to raise the event.
                handler(this, e);
            }
        }
 // Define what actions to take when the event is raised.
 void HandleCustomEvent(object sender, EventInfo e)
 {
     Console.WriteLine(id + " received this message: {0}", e.Message);
 }