MVC - Areas

Using Area in MVC you can split large application structure into small groups.
Each Area itself contains a MVC folder structure and in routing you need to add additional parameter 'area'.
e.g: http://localhost/AreaExample/Home/Index
AreaExampleAreaRegistration.cs

public override void RegisterArea(AreaRegistrationContext context) 
        {
            context.MapRoute(
                name: "AreaExample_default",
                url: "AreaExample/{controller}/{action}/{id}",
                defaults: new {controller="Home", action = "Index", id = UrlParameter.Optional }
            );
        }

What if more the one Area have same controller name ?
How you can define default area in routing for application?
In RouteConfig.cs you need to add additional parameter 'namespaces' in MapRoute.
eg:
RouteConfig.cs

public static void RegisterRoutes(RouteCollection routes)
        {
            routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional },
                namespaces: new [] { "LearnOnlineAspNet.MVCexample.Areas.AreaExample.Controllers" }
            );
        }

Hope it help you to understand the basic concept of Areas and it's routing structure.