Log4net 1.2.10.0 Official

// Configure log4net XmlConfigurator.Configure(config);

File = "logs/myapp-log.txt", AppendToFile = true, RollingStyle = RollingFileAppender.RollingStyle.Date, DatePattern = "yyyyMMdd", MaxSizeRollBackups = 10, MaximumFileSize = "10MB", Layout = new PatternLayout("%date [%thread] %-5level %logger - %message%newline") ; log4net 1.2.10.0

In App.config or Web.config :

If you are planning to move from 1.2.10.0 to log4net 2.0.x+: // Configure log4net XmlConfigurator