Question

routes.MapRoute(
            name: "GetAdressen",
            url: "{controller}",
            defaults: new { controller = "AdressenController", action = "GetAdressen"}
        );
        routes.MapRoute(
            name: "GetEinsaetze",
            url: "{controller}",
            defaults: new { controller = "EinsaetzeController", action = "GetEinsaetze"}
        );

In this case only /Adressen will work, and not also /Einsaetze

        routes.MapRoute(
            name: "GetEinsaetze",
            url: "{controller}",
            defaults: new { controller = "EinsaetzeController", action = "GetEinsaetze"}
        );
routes.MapRoute(
            name: "GetAdressen",
            url: "{controller}",
            defaults: new { controller = "AdressenController", action = "GetAdressen"}
        );

In this case only /Einsaetze will work, and not also /Adressen

Why?

Answer 1

Use Like This

   routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional },
                namespaces: new[] { "projectName.Controllers" });