c# - Simple Injector Web Forms -

okay have ui layer , bll layer.

namespace bll  {    public class user : iuser    {         public void dosomething(){}    }    public interface iuser    {         void dosomething();    }    public static class typeregistry    {         public static void registertypes(container container)         {             container.register<iuser, user>(lifestyle.singleton);         }     } }  namespace ui {      public partial class login : system.web.ui.page      {           private iuser user;      } } 

i can't figure how user not null. have tried making constructor caused error

    public login(iuser user){ this.user = user;} 

compilation error : login not contain constructor takes 0 arguments

this link helped me answer:

https://simpleinjector.readthedocs.org/en/latest/wpfintegration.html

similar @steven's link

https://simpleinjector.readthedocs.org/en/latest/windowsformsintegration.html