• Create a WPF application in Visual Studio.
  • Go to NuGet package manager.
  • Select Manage NuGet Packages for Solution.
  • Select log4net by Apache Software.
• Add a config file to project name it as “log4net.config”.
  • Select Application Configuration File from menu.
  • Rename file to “log4net.config”.
• Select log4net.config from solution explorer, see for options in properties :
  • Build Action → Change to “ Content”.
  • Copy to output directory → Change to “copy always”.

<log4net> <root> <level value="ALL" /> <appender-ref ref="console" /> <appender-ref ref="file" /> </root> <appender name="console" type="log4net.Appender.ConsoleAppender"> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date %level %logger - %message%newline" /> </layout> </appender> <appender name="file" type="log4net.Appender.RollingFileAppender"> <file value="DIRECTORY WHERE YOU WANT TO COPY THE LOG FILES\LOG_FILE_NAME.log" /> <appendToFile value="true" /> <rollingStyle value="Size" /> <maxSizeRollBackups value="5" /> <maximumFileSize value="2MB" /> <staticLogFileName value="true" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %level %logger - %message%newline" /> </layout> </appender> </log4net>

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

• Add 'using log4net;' reference.
• Add these codes inside “public partial class App : Application” :

private static readonly ILog log = LogManager.GetLogger(typeof(App)); protected override void OnStartup(StartupEventArgs e) { log4net.Config.XmlConfigurator.Configure(); log.Info(" ============= Started Logging ============= "); base.OnStartup(e); }

• Add reference :

   using log4net;

• Add these codes inside “public partial class MainWindow”

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

• Inside public MainWindow() :

  log4net.Config.XmlConfigurator.Configure();

• Options available for logs :

   /* * log.info * log.error * log.fatal * log.debug */ 

For Tutorial visit https://medium.com/nerd-stuff/logger-for-wpf-application-570eb9cbe546