Ok, that's also possible solution. But as you can see - you must call Configure() too, just on different configurator. Using of configuration file is really not necessary, you just must select appropriate configurator and configure logging system with its help Radovan
________________________________ Od: zafer aydin [mailto:zafera...@hotmail.com] Odesláno: 24. dubna 2012 7:14 Komu: log4net-user@logging.apache.org Předmět: RE: RemotingAppender Problem Hello Radovan; i solved the problem in an other way. Firstly, i load an almost empty xml configuration file with the following line of code: log4net.Config.XmlConfigurator.Configure(new FileInfo(filename)); After that i could add the appender in the way that i described in my question. I think we must first load an xml configuration to add loggers and appenders to loggers. I simply load a config which has no appenders in it. Then, I added the appenders in code. I am using vs2008, .net 3.5 C#. The problem is now seen to be solved. Thanks for your answer. Fer