This post would help developer that want to use entlib with different config file not app.config or web.config Enjoy public class LogMgr { private static IConfigurationSource _configSource; private static LogWriter _logWriter; static LogMgr() { m_configSource = ConfigMgr.FileConfigurationSource; LogWriterFactory logWrtFact = new LogWriterFactory(_configSource); logWriter = logWrtFact.Create(); logWriter.Write(logEnt); } } Technorati Tags: logger , entlib , config file