c# - How to automatically resolve named type in Autofac? -

in unity, can register named type this

using microsoft.practices.unity; var container = new unitycontainer(); container.registertype<ioutputservice, consoleoutputservice>("console"); container.registertype<ioutputservice, messageboxoutputservice>("messagebox"); container.registertype<icalculatorreplloop, calculatorreplloop>(); icalculatorreplloop loop = container.resolve<icalculatorreplloop>(); 

and auto resolve using attribute this

public class calculatorreplloop : icalculatorreplloop {     public calculatorreplloop() {}      [dependency("messagebox")]     public ioutputservice outputservice { get; set; } } 

i know how register named service in autofac

using autofac; using autofac.core; var builder = new containerbuilder(); builder.registertype<consoleoutputservice>().named<ioutputservice>("console"); builder.registertype<messageboxoutputservice>().named<ioutputservice>("messagebox"); builder.registertype<calculatorreplloop>().as<icalculatorreplloop>().singleinstance(); icontainer container = builder.build(); icalculatorreplloop loop = container.resolve<icalculatorreplloop>(); 

but how resolve inside calculatorreplloop class ?

look @ sample code , 1 of ways of auto resolve using autofac when share contract 2 implementations.

using system; using autofac; using autofac.features.indexed; namespace autofac     {          class program         {             static void main(string[] args)             {                 var builder = new containerbuilder();                 builder.registertype<onlinestate>().keyed<idevicestate>("online");                 builder.registertype<offlinestate>().keyed<idevicestate>("offline");                  builder.registertype<modem>().asimplementedinterfaces();                  var container = builder.build();                  var r = container.resolve<imodem>();                  r.print();              }         }     public interface idevicestate         {             string get();         }         public class onlinestate : idevicestate         {             public string get()             {                 return "onlinestate";             }         }         public class offlinestate : idevicestate         {             public string get()             {                 return "offlinestate";             }         }         public class modem  : imodem         {              readonly iindex<string, idevicestate> _states;              private readonly idevicestate _devicestate;              public modem(iindex<string, idevicestate> states)              {                  _states = states;                  _devicestate = _states["online"];                 //_devicestate = _states["offline"];              }               public void print()              {                  console.writeline(_devicestate.get());              }         }          public interface imodem         {             void print();         }     }