创建测试工程
分别在vs2013和vs2015中创建mvc项目，并创建First、Second、Three三个Area，每个Area下面创建一个HomeController和Index视图。修改RouteConfig.cs中的路由注册方法，添加命名空间
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }, namespaces: new[] { "RouteDebuggerMvc5Demo.Controllers" }
);
}