问C#进程二进制文件，多线程处理

EN

        var dic = new Dictionary<DateTime, Data>();        
        var resetEvent = new ManualResetEvent(false);

        using (var b = new BinaryReader(File.Open(Constants.dataFile, 
                            FileMode.Open, FileAccess.Read, FileShare.Read)))
        {
        var lByte = b.BaseStream.Length;
        var toProcess = 0;

        while (lByte >= DATALENGTH)
        {
            b.BaseStream.Position = lByte;
            lByte = lByte - AB_DATALENGTH;

            ThreadPool.QueueUserWorkItem(delegate
            {
                Interlocked.Increment(ref toProcess);
                var lineData = PROCESS_Binary_Return_lineData(b);

                lock(dic)
                {
                    if (!dic.ContainsKey(lineData.DateTime))
                    {
                     dic.Add(lineData.DateTime, lineData); 
                    }
                }

                if (Interlocked.Decrement(ref toProcess) == 0) resetEvent.Set();
            }, null);
        }
        }

        resetEvent.WaitOne();