public static ILog GetCustomLogger(string loggerName, string category = null, bool additivity = false) { return(loggerContainer.GetOrAdd(loggerName, delegate(string name) { RollingFileAppender newAppender = null; ReadParamAppender appender = null; if (appenderContainer.ContainsKey(loggerName)) { appender = appenderContainer[loggerName]; newAppender = GetNewFileApender(loggerName, string.IsNullOrEmpty(appender.File) ? GetFile(category, loggerName) : appender.File, appender.MaxSizeRollBackups, appender.AppendToFile, true, appender.MaximumFileSize, RollingFileAppender.RollingMode.Composite, appender.DatePattern, appender.LayoutPattern); } else { newAppender = GetNewFileApender(loggerName, GetFile(category, loggerName), MAX_SIZE_ROLL_BACKUPS, true, true, MAXIMUM_FILE_SIZE, RollingFileAppender.RollingMode.Composite, DATE_PATTERN, LAYOUT_PATTERN); } log4net.Repository.Hierarchy.Hierarchy repository = (log4net.Repository.Hierarchy.Hierarchy)LogManager.GetRepository(); Logger logger = repository.LoggerFactory.CreateLogger(repository, loggerName); logger.Hierarchy = repository; logger.Parent = repository.Root; logger.Level = GetLoggerLevel(appender == null ? LEVEL : appender.Level); logger.Additivity = additivity; logger.AddAppender(newAppender); logger.Repository.Configured = true; return new LogImpl(logger); })); }