如何通过代码将Log4Net.Async添加到Log4Net

Question

我通过以下方式使用Log4Net：

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

public static void Init(Level logLevel, bool autoFlush, string logTextFile)
{
    var hierarchy = (Hierarchy) LogManager.GetRepository();
    var patternLayout = new PatternLayout();
    patternLayout.ConversionPattern = "%date{yyyy-MM-dd HH:mm:ss.fff} %-7level [%thread] %message%newline";               
    patternLayout.ActivateOptions();

    var roller = new RollingFileAppender();
    roller.AppendToFile = false;
    roller.File = logTextFile;
    roller.Layout = patternLayout;
    roller.MaxSizeRollBackups = 3;
    roller.MaxFileSize = 10000000;
    roller.RollingStyle = RollingFileAppender.RollingMode.Size;
    roller.StaticLogFileName = true;
    roller.ImmediateFlush = autoFlush;
    roller.ActivateOptions();
    hierarchy.Root.AddAppender(roller);
    hierarchy.Root.Level = Level.Info;
    hierarchy.Configured = true;
}

那很好。

现在我想添加Log4Net.Async，但是我完全不知道如何通过代码添加它。有人可以给我一个例子吗？