C# (CSharp) BusyEvent примеры использования

Пример #1

        public void SetBusy(bool?busy)
        {
            if (busy.HasValue)
            {
                _lastBusy = busy.Value;
            }

            BusyEvent?.Invoke(this, _lastBusy);
        }

Пример #2

 private void OnBusyEvent(BusyEventArgs busyEventArgs)
 {
     BusyEvent?.Invoke(this, busyEventArgs);
 }