C# (CSharp) BusyChanged.Invoke примеры использования

Пример #1

 private void SetBusy
 (
     bool busy
 )
 {
     Busy = busy;
     BusyChanged?.Invoke(this, EventArgs.Empty);
 } // method SetBusy

Пример #2

 private void RaiseBusyChanged(bool newIsBusy)
 {
     BusyChanged?.Invoke(this, newIsBusy);
 }