routes.MapRoute(
name: "slug",
url: "{slug}",
defaults: new { controller = "Home", action = "show" },
constraints: new { slug = ".+" });

public async Task<ActionResult> Show(string slug)
{
return RedirectToRoute(ProfileControllerRoute.GetIndex, new { slug = slug});
}

[Route("GetIndex", Name = ProfileControllerRoute.GetIndex)]
public ActionResult Index(int? page, string slug = null)