internal void Update(int row, int nrows, double bid, double bidsize, double ask, double asksize)
        {
            if (row == 0)
            {
                _asks = new Quote[depth];
                _bids = new Quote[depth];
            }

            _asks[row] = new Quote((decimal)ask, (decimal)asksize, eSide.Sell);
            _bids[row] = new Quote((decimal)bid, (decimal)bidsize, eSide.Buy);

            if (row == Depth -1 || row == nrows -1)
            {
                Object lck = new Object();

                lock(lck)
                {
                    Asks = _asks;
                    Bids = _bids;
                }

                Time = DateTime.Now;
                _asks = null;
                _bids = null;

                IsUpdate = true;

            }
        }
 public MarketDepth(int depth)
 {
     this.depth = depth;
     Asks = new Quote[depth];
     Bids = new Quote[depth];
 }