All programs should be able to log. With log4net this is made easy. Start with this great tutorial.
Quick guide:
log4net has a lot of settings and features. This sample shows how to log to a simple text file with some default settings
1. Use NuGet to install log4net in your project
2. In the App.config file, add this section of code:
<?xml version="1.0"?>
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
<log4net>
<!-- levels: ALL, DEBUG, INFO, WARN, ERROR, FATAL, OFF -->
<root>
<level value="INFO" />
<appender-ref ref="FileAppender" />
</root>
<appender name="FileAppender" type="log4net.Appender.RollingFileAppender, log4net" >
<param name="File" value="Log.txt" />
<param name="AppendToFile" value="false" />
<param name="maximumFileSize" value="200KB" />
<param name="maxSizeRollBackups" value="1" />
<layout type="log4net.Layout.PatternLayout, log4net">
<conversionPattern
value="%date{yyyy.MM.dd hh:mm:ss} %-5level [%thread] - %message%newline" />
</layout>
</appender>
</log4net>
</configuration>
3. You need 3 lines of code
First, just below the using statements
[assembly: log4net.Config.XmlConfigurator(Watch = true)]
Then in every class, add this line
private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
Now you are ready to log
log.Info("Hello World");
Links