private void RunPoolThreads(int count, ThreadAction action)
        {
            // TODO: Run 'count' pool threads and execute 'action' in every one with appropriate range of data
            // TODO: Use 'ManualResetEvent' to synchronize operations

            int step = _data.Length / count;
            var x = 0;
            for (int i = 0; i < count ; i++)
            {
                var start = x;
                var stop = x + step;
                x += step;
                if (i == count - 1)
                {
                    stop = _data.Length;
                }
                ThreadPool.QueueUserWorkItem( o => action(start, stop));

                manualResetEvent.WaitOne();
                manualResetEvent.Reset();
            }
        }