Customize log4net Output Path

The default log4net output path is relative to the startup directory of your executable. To customize the output path, you can override the base Appender’s File property in your own Appender class. The following example describes how to route the log files relative to the temp folder :

   public class MyOwnAppender : log4net.Appender.RollingFileAppender
   {
         public override string File
         {
             get
             {
                 return base.File;
             }

            set
            {
                if (Path.IsPathRooted(value))
                {
                    base.File = value;
                }
                else
                {
                    base.File = Path.Combine(Path.GetTempPath(), value);
                }
            }
        }
    }

Your log4net config file must be modified so that log4net can locate and use your custom Appender. If MyOwnAppender is in MyNamespace and you have implemented it in MyLoggerLib.dll :

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