需求描述：用一個(gè)線(xiàn)程池處理讀取到的文件信息，但是 while 之后有一塊代碼始終沒(méi)有走不知道為什么?

代碼：

 public static void ListLine()
        {
            using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read))
            {
                fs.Position = position;
                using (StreamReader sr = new StreamReader(fs, Encoding.UTF8))
                {
                    string line = string.Empty;
                    List<string> listStr = new List<string>();
                    AnalyticalArithmetic analytickal;
                    while ((line = sr.ReadLine()) != null)
                    {
                        if (listStr.Count == 100)
                        {
                            analytickal = new AnalyticalArithmetic();
                            analytickal.listStr = listStr;
                            ThreadPool.QueueUserWorkItem(analytickal.test);
                            listStr = new List<string>();
                        }
                        listStr.Add(line);
                    }
                    //斷點(diǎn)未到達(dá)這里
                    analytickal = new AnalyticalArithmetic();
                    analytickal.listStr = listStr;
                    ThreadPool.QueueUserWorkItem(analytickal.test);
                    position = fs.Length;
                }
            }

        }