public class Program
    {
        private static void Main()
        {
            string currentPath = AppDomain.CurrentDomain.BaseDirectory;
            string txtLogPath = string.Empty;
            string iisBinPath = AppDomain.CurrentDomain.RelativeSearchPath;
            if (!string.IsNullOrEmpty(iisBinPath))
                txtLogPath = Path.Combine(iisBinPath, "ErrorLog.txt");
            else
                txtLogPath = Path.Combine(currentPath, "ErrorLog.txt");
            FileAppender fileAppender = new FileAppender();
            fileAppender.Name = "LogFileAppender";
            fileAppender.File = txtLogPath;
            fileAppender.AppendToFile = true;
            PatternLayout patternLayout = new PatternLayout();
            patternLayout.ConversionPattern = "记录时间：%date \r\n线程ID:[%thread] \r\n日志级别：%-5level \r\n出错类：%logger property:[%property{NDC}]\r\n错误描述：%message%\r\n";
            patternLayout.Footer = "------------------------add by 夜色、花清浅--------------------";
            patternLayout.ActivateOptions();
            fileAppender.Layout = patternLayout;
            //UTF8编码，确保中文不乱码。
            fileAppender.Encoding = Encoding.UTF8;
            fileAppender.ActivateOptions();
            BasicConfigurator.Configure(fileAppender);
            InvokeErrorLog(MethodBase.GetCurrentMethod().DeclaringType, "112312312323", new Exception());
        }
        public static void InvokeErrorLog(Type methedType, string errorMsg, Exception ex)
        {
            ILog log = log4net.LogManager.GetLogger(methedType);
            log.Info(errorMsg, ex);
        }
    }