找到多个与名为“Home”的控制器匹配的类型的解决方案

public class RouteConfig
    {
        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 },
                //这里很重要 一定要是正确的 命名空间 否则一样会报错 
                namespaces: new string[] { "Demo.Controllers" }
            );
        }
    }

public override void RegisterArea(AreaRegistrationContext context)
        {
            context.MapRoute(
                "T200_default",
                "T200/{controller}/{action}/{id}",
                 new { action = "Index", id = UrlParameter.Optional },
                 new string[] { "Demo.Areas.T200.Controllers" }
            );
        }