www.step.cn/Home/index
www.step.cn/Home/index/Default
www.step.cn/Home/index/Default.aspx
这三个链接都是指向第一个的，MVC框架，
现在要下面两个链接点进去之后，浏览器地址自动变成第一个，要怎么操作？

    public override void RegisterArea(AreaRegistrationContext context) 
    {
        context.MapRoute(
            "About_aspx",
            "About/{controller}.aspx",
            new { controller = "Default", action = "Index" },
            new string[] { "WWWNewV2.Areas.About.Controllers" }
        );

        context.MapRoute(
            "About_default",
            "About/{controller}/{action}/{id}",
            new { controller = "Default", action = "Index", id = UrlParameter.Optional },
            new string[] { "WWWNewV2.Areas.About.Controllers" }
        );
    }