public static class LogHelper

    {

        //日志存储路径

        private static string LogPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, System.Configuration.ConfigurationManager.AppSettings["LogPath"]);

        private static object LogLock = new object();//日志锁

        /// <summary>

        /// 添加正常信息

        /// </summary>

        /// <param name="message"></param>

        public static void AddInfo(string message)

        {

            string fileName = DateTime.Now.ToString("yyyyMMdd") + ".txt";//日志名称

            string fullName = Path.Combine(LogPath, fileName);

            lock (LogLock)

            {

                if (!Directory.Exists(LogPath))//如果目录不存在 创建目录

                {

                    Directory.CreateDirectory(LogPath);

                }

                using (var stream = File.AppendText(fullName))

                {

                    stream.WriteLine(message);

                }

                Console.WriteLine(message);

            }

        }

        /// <summary>

        /// 添加错误信息

        /// </summary>

        /// <param name="errorMessage"></param>

        public static void AddError(string errorMessage)

        {

            string fileName ="Error_"+ DateTime.Now.ToString("yyyyMMdd") + ".txt";//日志名称

            string fullName = Path.Combine(LogPath, fileName);

            lock (LogLock)

            {

                if (!Directory.Exists(LogPath))//如果目录不存在 创建目录

                {

                    Directory.CreateDirectory(LogPath);

                }

                using (var stream = File.AppendText(fullName))

                {

                    stream.WriteLine(errorMessage);

                }

                Console.WriteLine(errorMessage);

            }

        }

    }