public AsyncThumbnailsLoader(IList <ThumbnailItem> itemsList, ThumbnailList list)
        {
            _thumbnailItems = itemsList;
            _thumbnailList  = list;

            _workerThread = new QueueProcessingThread(ThreadPriority.BelowNormal, Thread.CurrentThread);
            ExecutionEngine.EventLogger.Write("AsyncThumbnailsLoader created");
        }
        protected virtual void Dispose(bool disposing)
        {
            if (disposing && !_isDisposed)
            {
                _isDisposed = true;

                if (_workerThread != null)
                {
                    _workerThread.Dispose();
                    _workerThread = null;
                }
            }
        }