How can I avoid duplicate content in ASP.NET MVC due to case-insensitive URLs and defaults?

Question

Edit: Now I need to solve this problem for real, I did a little more investigation and came up with a number of things to reduce duplicat

Answer 1

i really don't know how you are going to feel after 8 years but Now ASP MVC 5 supports attribute routing for easy to remember routes and to solved duplicate content problems for SEO Friendly sites

just add routes.MapMvcAttributeRoutes(); in your RouteConfig and then define one and only route for each action like

    [Route("~/")]
    public ActionResult Index(int? page)
    {
        var query = from p in db.Posts orderby p.post_date descending select p;
        var pageNumber = page ?? 1;
        ViewData["Posts"] = query.ToPagedList(pageNumber, 7);         
        return View();
    }
    [Route("about")]
    public ActionResult About()
    {
        return View();
    }
    [Route("contact")]
    public ActionResult Contact()
    {
        return View();
    }
    [Route("team")]
    public ActionResult Team()
    {
        return View();
    }
    [Route("services")]
    public ActionResult Services()
    {
        return View();
    }