A sample config file that contains the most basic structure of a typical config file.

SampleLog4netConfigfile.config.xml

<!-- Save this file to as SampleLog4netConfigfile.config and load it with the following code inside the AssemblyInfo.cs file 
of the project: 

[assembly: log4net.Config.XmlConfigurator(ConfigFile = "SampleLog4netConfigfile.config", Watch = true)]

After this, log4net library can be used inside the project. For example, logger variables can be defined as private static
variables:

private static readonly ILog log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

-->

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
	<configSections>
		<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
	</configSections>
	<log4net>
		<root>
			<level value="DEBUG"/>
			<appender-ref ref="RollingFileAppender"/>
		</root>
		<appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
			<file value="logfile.txt"/>
			<appendToFile value="true"/>
			<rollingStyle value="Size"/>
			<maxSizeRollBackups value="5"/>
			<maximumFileSize value="10MB"/>
			<staticLogFileName value="true"/>
			<lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
			<layout type="log4net.Layout.PatternLayout">
				<conversionPattern value="%date [%thread] %level %logger - %message%newline%exception"/>
			</layout>
		</appender>
	</log4net>
</configuration>