log4net use case in .NET Core project

1. Create a new .NET Core project, select the console application, and name it TestNetCore.

2. Use Nuget program manager, add log4net ,

3. Add log4net.config as follows

<? xml version = " 1.0 " encoding = " utf-8 " ?> 
<!-Note: If it is used in aspnetcore, there is no need to add a configuration tag in log4net.config, you can refer to AddLog4Net of TestNetCore-- > 
<configuration> 
  <log4net> 
    <appender name = " ConsoleAppender " type = " log4net.Appender.ConsoleAppender " > 
      <layout type = " log4net.Layout.PatternLayout " value = " % date [% thread]% -5level% logger- % message% newline " /> 
    </ appender> 
    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="Log\Log.txt" />
      <param name="AppendToFile" value="true" />
      <param name="MaxSizeRollBackups" value="100" />
      <param name="MaximumFileSize" value="2MB" />
      <param name="RollingStyle" value="Size" />
      <param name="StaticLogFileName" value="true" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%-15p %d [%c] %m%n" />
      </layout>
    </appender>
    <root>
      <!--<level value="off" />-->
      <!--<level value="Fatal" />-->
      <!--<level value="error" />-->
      <!--<level value="Warn" />-->
      <!--<level value="Info" />-->
      <level value="Debug" />
      <!--<level value="all" />-->
      <appender-ref ref="ConsoleAppender" />
      <appender-ref ref="RollingLogFileAppender" />
    </root>
  </log4net>  
</configuration>

Note: Set the log4net.config property to be copied to the output directory

4. Add the following in Program

using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;
using System;
using Microsoft.Extensions.Logging;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Globalization;
using System.Reflection;
using log4net;
using System.IO;
using log4net.Repository;
using log4net.Config;

namespace TestNetCore
{
    internal class Program
    {
        //public static log4net.ILog Log = log4net.LogManager.GetLogger (MethodBase.GetCurrentMethod (). DeclaringType); 
        static  void Main ( string [] args) 
        { 
            ILoggerRepository loggerRepository = LogManager.CreateRepository ( " TestNetCore " );
             // default configuration, this Only output to the console, and this does not need log4net.config file
             // BasicConfigurator.Configure (loggerRepository);
             // Specify the configuration file 
            XmlConfigurator.Configure (loggerRepository, new FileInfo ( " log4net.config " )); 

            ILog Log= LogManager.GetLogger(loggerRepository.Name, typeof(Program));
            Log.Fatal("Fatal");
            Log.Error("Error");
            Log.Warn("Warn");
            Log.Info("Info");
            Log.Debug("Debug");
            Console.ReadLine();
        }
   }
}

5. Running effect