BCNet.Bitcoin.RequestBlocks C# (CSharp) Method

        void RequestBlocks()
        {
            List<BlockHeader> requests = new List<BlockHeader>();
            mBlockLock.WaitOne();
            foreach (Block b in mBlocks)
            {
                if (b.mTransactions.Count == 0)
                {
                    TimeSpan s = DateTime.Now - b.mLastRequestTime;
                    if (s.TotalSeconds > 30)
                    {
                        requests.Add(b.mHeader);
                        b.mLastRequestTime = DateTime.Now;
                    }
                }
            }
            mBlockLock.ReleaseMutex();

            if (requests.Count > 0)
            {
                mLastNode.RequestBlocks(requests.ToArray());
            }
        }