internal static void SetListenerLevel(AdalTraceLevel level)
        {
            if (level != AdalTraceLevel.None)
            {
                if (adalListener == null)
                {
                    adalListener = new StorageFileEventListener(LogFilename);
                }

                adalListener.EnableEvents(AdalEventSource, GetEventLevel(level));
            }
            else if (adalListener != null)
            {
                adalListener.DisableEvents(AdalEventSource);
                adalListener.Dispose();
                adalListener = null;
            }
        }