asp.netcore Log4Net连接kafka的方法

public class Program
    {
        public static void Main(string[] args)
        {
             System.Threading.ThreadPool.SetMinThreads(200, 200);
            // NLogBuilder.ConfigureNLog("Config/nlog.config");
            //  NLogBuilder.ConfigureNLog("Config/nlog.config").GetCurrentClassLogger();
            CreateWebHostBuilder(args).Build().Run();
        }

        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args).
            ConfigureLogging((context, loggingbuilder) =>
            {
                //该方法需要引入Microsoft.Extensions.Logging名称空间

                loggingbuilder.AddFilter("System", LogLevel.Warning); //过滤掉系统默认的一些日志
                loggingbuilder.AddFilter("Microsoft", LogLevel.Warning);//过滤掉系统默认的一些日志
                //var path = Directory.GetCurrentDirectory() + "\\log4net.config"; 
                //不带参数：表示log4net.config的配置文件就在应用程序根目录下，也可以指定配置文件的路径
                loggingbuilder.AddLog4Net("Config/log4net.config");
            })
              .UseStartup<Startup>();
    }

<?xml version="1.0" encoding="utf-8" ?>
<log4net>
  <appender name="KafkaAppender" type="log4net.Kafka.Core.KafkaAppender, log4net.Kafka.Core">
    <KafkaSettings>
      <broker value="地址1:端口,地址2:端口,地址3：端口" />
      <topic value="kafka的topic" />
    </KafkaSettings>
    <layout type="log4net.Kafka.Core.KafkaLogLayout,log4net.Kafka.Core" >
      <appid value="sysName" />
    </layout>
  </appender>
  <root>
    <level value="ALL"/>
    <appender-ref ref="KafkaAppender" />
  </root>
</log4net>