写入和读取本地文件。

  //读取
        public static List<ConfigurationInfo> Read()
        {
            string context = null;
            string filePath = Environment.CurrentDirectory + "/Configuration.txt";//获取文件根目录
            if (File.Exists(filePath))
            {
                FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read); //指定的路径 ，读取的模式，初始实例化
                using (StreamReader sr = new StreamReader(fs, Encoding.GetEncoding("gb2312")))
                {
                    context = sr.ReadToEnd();
                }
                fs.Dispose();
                fs.Close();
            }
            else
            {
                Write(GetConfigurationList()); //写入
                return GetConfigurationList(); //返回
            }
            var _instance = JsonConvert.DeserializeObject<List<ConfigurationInfo>>(context);
            return _instance;
        }
  //读取
        p