Log using action filters

FilterConfig.cs

public class FilterConfig
{
    public static void RegisterGlobalFilters(GlobalFilterCollection filters)
    {
        filters.Add(new LogFilterAttribute());
    }
}

LogFilterAttribute.cs

public class LogFilterAttribute : ActionFilterAttribute, IActionFilter
{
    private Stopwatch _stopwatch;

    private static Logger _logger = LogManager.GetCurrentClassLogger();

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        _logger.Info(string.Format("Request ({0}) start at {1}", filterContext.HttpContext.Request.Url.AbsolutePath, DateTime.Now));
        _stopwatch = Stopwatch.StartNew();
    }

    public override void OnActionExecuted(ActionExecutedContext filterContext)
    {
        _stopwatch.Stop();
        _logger.Info(string.Format("Request ({0}) end at {1} - time {2}", filterContext.HttpContext.Request.Url.AbsolutePath, DateTime.Now,
            _stopwatch.ElapsedMilliseconds));
    }
}