you can mention the namespace in the route config as explained below:
routes.MapRoute(
name: "Default",
url: "{Controller}/{action}/{id}",
defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional },
namespaces: Web.Controllers
);
routes.MapRoute(
name: "baseadmin",
url: "BaseAdmin/Home/{action}/{id}",
defaults: new
{
controller = "BaseAdmin/Home",
action = "Index",
issueId = UrlParameter.Optional,
projectId = UrlParameter.Optional
},
namespaces:Web.Areas.BaseAdmin.Controllers
);