为.Net Core3.1应用程序配置log4net的最简单正确的方法

<ItemGroup>
  <PackageReference Include="log4net.Extensions.Logging" Version="2.0.8" />
</ItemGroup>

using log4net.Extensions.Logging;
using Microsoft.Extensions.Logging;

public class Program
{
    public static void Main(string[] args)
    {
        var loggerFactory = new LoggerFactory()
            .AddLog4Net(); // 添加log4net的支持

        Log.Logger = loggerFactory.CreateLogger<Program>();

        CreateHostBuilder(args).Build().Run();
    }

    public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseStartup<Startup>();
            })
            .ConfigureLogging((hostingContext, logging) =>
            {
                logging.ClearProviders();
                logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));
                logging.AddConsole();
            })
            .UseServiceProviderFactory(new AutofacServiceProviderFactory()) // 如果你使用Autofac，可以添加这行
            .UseNLog(); // 如果你还想使用NLog作为日志记录工具，可以添加这行
}

{
  "Logging": {
    "Log4NetConfigFile": "log4net.config"
  },
  "AllowedHosts": "*"
}

using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;

[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{
    private readonly ILogger<WeatherForecastController> _logger;

    public WeatherForecastController(ILogger<WeatherForecastController> logger)
    {
        _logger = logger;
    }

    [HttpGet]
    public IEnumerable<WeatherForecast> Get()
    {
        _logger.LogInformation("Getting weather forecast");

        // 其他代码...

        return forecasts;
    }
}