/// <summary>
        /// 写入记事本
        /// </summary>
        /// <param name="log">日志内容</param>
        /// <param name="filepath">文件路径（含文件名）</param>
        /// <returns></returns>
        private static bool WriteTxt(string log, string filepath)
        {
            try
            {
                string folder = filepath.Substring(0, filepath.LastIndexOf(‘\\‘));
                // 创建目录
                if (Directory.Exists(folder) == false)
                {
                    Directory.CreateDirectory(folder);
                }
                // 当文件不存在时创建文件
                if (File.Exists(filepath) == false)
                {
                    FileStream fs = File.Create(filepath);
                    fs.Close();
                }
                // 写入文件内容
                File.AppendAllText(filepath, "【" + DateTime.Now.ToString("yyyyMMdd HH:mm:ss") + "】" + log + "\r\n", Encoding.Default);
                return true;
            }
            catch
            {
                return false;
            }
        }