初始化没有xml文件的log4net

using log4net;
using log4net.Appender;
using log4net.Core;
using log4net.Layout;
using log4net.Repository.Hierarchy;

public class LogHelper
{
    private static readonly ILog log = LogManager.GetLogger(typeof(LogHelper));

    public static void Init()
    {
        var hierarchy = (Hierarchy)LogManager.GetRepository();
        hierarchy.Root.RemoveAllAppenders();

        var patternLayout = new PatternLayout();
        patternLayout.ConversionPattern = "%date [%thread] %-5level %logger - %message%newline";
        patternLayout.ActivateOptions();

        var consoleAppender = new ConsoleAppender();
        consoleAppender.Layout = patternLayout;
        consoleAppender.ActivateOptions();

        hierarchy.Root.AddAppender(consoleAppender);
        hierarchy.Root.Level = Level.Debug;
        hierarchy.Configured = true;
    }

    public static void Log(string message)
    {
        log.Info(message);
    }
}

LogHelper.Init();
LogHelper.Log("This is a log message.");