I would like to serve a user friendly "not found" page in my ASP.NET MVC application while providing a 404 status code. (based on this answer)

我已经有了机制来捕获无效路由，并且我的ErrorController/Handle404操作提供了自定义404页面。

我当前的Handle404实现:

    public ActionResult Handle404()
    {
        Response.StatusCode = 404;
        return View("NotFound");
    }

当前，IIS将页面用作404 - File or directory not found.The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.(标准IIS页面，而不是我的用户友好内容)

在仍提供内容的同时，如何在Handle404操作提供的结果中包含404状态代码？

环境

 Response.TrySkipIisCustomErrors = true;

做到了。