c# - After changing path using RouteConfig old path is not working -

i working on c# asp.net mvc project entity framework.

i trying change url path using routeconfig.cs

first code looked this

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 = "account", action = "login", id = urlparameter.optional }         );     } } 

i wanted chenge url localhost/customer/index localhost/index

so added line of code , worked

routes.maproute(     name: "customer",     url: "customer",     defaults: new { controller = "customer", action = "index"} ); 

next tried changing localhost/customer/details/2 localhost/customername/2.

// customername varies each customer 

so added this

 routes.maproute(      name: "customerdetail",      url: "customer/{name}/{id}",      defaults: new { controller = "customer", action = "details", id = urlparameter.optional, name = urlparameter.optional } ); 

now customer details page loads correctly.

but loading index page using path localhost/customer/index causes error, while localhost/customer causes no error. why happening?

edit

this how routeconfig looks like

public class routeconfig {     public static void registerroutes(routecollection routes)     {         routes.ignoreroute("{resource}.axd/{*pathinfo}");          routes.maproute(             name: "customer",             url: "customer",             defaults: new { controller = "customer", action = "index"}         );         routes.maproute(             name: "customerdetail",             url: "customer/{name}/{id}",             defaults: new { controller = "customer", action = "details", id = urlparameter.optional, name = urlparameter.optional }         );          routes.maproute(             name: "default",             url: "{controller}/{action}/{id}",             defaults: new { controller = "account", action = "login", id = urlparameter.optional }         );     } } 

finally found answer.

as @stephenmuecke commented

localhost/customer/index matches customerdetail route (and passes "index" id parameter)

so rechecked code , found id field in localhost/customer/details/2 not optional , accidently defined optional, id = urlparameter.optional.

 routes.maproute(         name: "customerdetail",         url: "customer/{name}/{id}",         defaults: new { controller = "customer", action = "details", name = urlparameter.optional }     ); 

full routconfig code:

public class routeconfig {     public static void registerroutes(routecollection routes)     {         routes.ignoreroute("{resource}.axd/{*pathinfo}");          routes.maproute(             name: "customer",             url: "customer",             defaults: new { controller = "customer", action = "index"}         );         routes.maproute(             name: "customerdetail",             url: "customer/{name}/{id}",             defaults: new { controller = "customer", action = "details",name = urlparameter.optional }     );          routes.maproute(             name: "default",             url: "{controller}/{action}/{id}",             defaults: new { controller = "account", action = "login", id = urlparameter.optional }         );      } }