public void SetUpdateTime(string strNewDate)        {            try            {                var path =Application.StartupPath + ConfigurationManager.AppSettings["UpdateFile"];                // 判断文件是否存在，不存在则创建，否则读取值显示到窗体                if (!File.Exists(path))                {                    FileStream fs1 = new FileStream(path, FileMode.Create, FileAccess.Write);//创建写入文件                    StreamWriter sw = new StreamWriter(fs1);                    sw.WriteLine(strNewDate);//开始写入值                    sw.Close();                    fs1.Close();                }                else                {                    FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Write);                    StreamWriter sr = new StreamWriter(fs);                    sr.WriteLine(strNewDate);//开始写入值                    sr.Close();                    fs.Close();                }            }            catch (Exception e)            {                LogWrite.ErrorLog(e);            }        }        public DateTime GetUpdatedTime()        {            var reslut = DateTime.MaxValue;            StreamReader sr = null;            try            {                var path = System.Windows.Forms.Application.StartupPath + ConfigurationManager.AppSettings["UpdateFile"];                // 判断文件是否存在，不存在则创建，否则读取值显示到窗体                sr = new StreamReader(path, Encoding.Default);                String line = sr.ReadLine();                if (line != null)                {                    reslut = Convert.ToDateTime(line.ToString());                }            }            catch (Exception e)            {                LogWrite.ErrorLog(e);            }            sr.Close();            return reslut;        }