c# - Why is the controller's parameterless constructor called and not the one with the biggest number of parameters -

i have had website asp.net mvc solution

my controller had 2 constructors: 1 parameterless , 1 few parameter.

the code used go through ctor parameters, injection them di using unity container.

i have merged website one.

now controller initialized via parameterless ctor.

what missing? code:

the initializer code executed.

public static class initializer {     private static bool isinitialize;     private static readonly object lockobj = new object();     private static iunitycontainer defaultcontainer = new unitycontainer();      static initializer()     {         initialize();     }      public static void initialize()     {         if (isinitialize)             return;          lock (lockobj)         {             iunitycontainer container = defaultcontainer;              //registering unity web api             globalconfiguration.configuration.dependencyresolver = new unity.webapi.unitydependencyresolver(container);             //registering unity mvc             dependencyresolver.setresolver(new unitydependencyresolver(container));              container.registertype<icritierialoader, critierialoader>();             container.registertype<iappsloader, appsloader>();             container.registertype<isavetesttobd, savetesttodb>();             container.registertype<itestoperations, testoperations>();               container.registertype<iservicesmanager, servicesmanager>();             container.registertype<imamconfigurationmanager, mamconfigurationsmanager>();             container.registertype<iappsdatamanager, appsdatamanager>();             container.registertype<imamconfiguration_v1manager, mamconfiguration_v1manager>();             container.registertype<ictidprod_v1manager, ctidprod_v1manager>();             container.registertype<ictidsaliasmanager, ctidsaliasmanager>();               container.registertype<idalfactory, dalfactory>();             container.registertype<idal<appsdatabl>, appsdatadal>();             container.registertype<iapplicationlogger, log4netlogger>();             container.registertype<idal<mamconfigurationbl>, mamconfigurationbldal>();             container.registertype<idal<conduit.mam.mamdbentityframework.mamconfiguration>, mamconfigurationdal>();             container.registertype<idal<addservicebl>, newservice>();               container.registertype<ialias_v1uitoefconvertor, alias_v1uitoefconvertor>(new containercontrolledlifetimemanager());             container.registertype<imamconfiguration_v1uitoefconvertor, mamconfiguration_v1uitoefconvertor>(new containercontrolledlifetimemanager());             container.registertype<ictidprodvalidator, ctidprodvalidator>(new containercontrolledlifetimemanager());             container.registertype<igeoprodvalidator, geoprodvalidator>(new containercontrolledlifetimemanager());             container.registertype<iconstlistsprovider, constlistsprovider>(new containercontrolledlifetimemanager());             container.registertype<ientitytouiconvertor, entitytouiconvertor>();              if (!isinitialize)             {                 isinitialize = true;             }         }     } } 

.

    protected void application_start()     {         log.application.warn("application started", "application started");          webapiconfig.configure(globalconfiguration.configuration);          arearegistration.registerallareas();          filterconfig.registerglobalfilters(globalfilters.filters);          routeconfig.registerroutes(routetable.routes);          bundleconfig.registerbundles(bundletable.bundles);          initializer.initialize(); 

.

[authorize] public class ctidprodcontroller : sapcontroller {      #region members      private iapplicationlogger mapplicationlog { get; set; }      //private imamconfiguration_v1manager mmamconfigurationmanager { get; set; }      private icritierialoader mcritierialoader { get; set; }      private iappsloader mappsloder { get; set; }      private imamconfiguration_v1uitoefconvertor mmamconfiguration_v1uitoefconvertor { get; set; }      private ctidprodmodel mctidprodmodel { get; set; }      private iconstlistsprovider mconstlistsprovider { get; set; }      private ictidprod_v1manager mctidprod_v1manager { get; set; }      private ictidsaliasmanager mctidsaliasmanager { get; set; }       #endregion       #region ctor      public ctidprodcontroller()     {      }       public ctidprodcontroller(iapplicationlogger logger, ictidprod_v1manager ctidprod_v1manager,         icritierialoader critierialoader, iappsloader appsloder, imamconfiguration_v1uitoefconvertor mamconfiguration_v1uitoefconvertor,         iconstlistsprovider constlistsprovider, ictidsaliasmanager ctidsaliasmanager)     {         mapplicationlog = logger;          mctidprod_v1manager = ctidprod_v1manager;          mcritierialoader = critierialoader;          mappsloder = appsloder;          mmamconfiguration_v1uitoefconvertor = mamconfiguration_v1uitoefconvertor;          mconstlistsprovider = constlistsprovider;          mctidsaliasmanager = ctidsaliasmanager;          fillmodel(mconstlistsprovider);     }       #endregion     } 

the new website code: injection code:

public class ninjectdependencyscope : idependencyscope {     private iresolutionroot resolver;      internal ninjectdependencyscope(iresolutionroot resolver)     {         contract.assert(resolver != null);          this.resolver = resolver;     }      public void dispose()     {         idisposable disposable = resolver idisposable;         if (disposable != null)             disposable.dispose();          resolver = null;     }      public object getservice(type servicetype)     {         if (resolver == null)             throw new objectdisposedexception("this", "this scope has been disposed");          return resolver.tryget(servicetype);     }      public ienumerable<object> getservices(type servicetype)     {         if (resolver == null)             throw new objectdisposedexception("this", "this scope has been disposed");          return resolver.getall(servicetype);     } }  public class ninjectdependencyresolver : ninjectdependencyscope, idependencyresolver {     private ikernel kernel;      public ninjectdependencyresolver(ikernel kernel)         : base(kernel)     {         this.kernel = kernel;     }      public idependencyscope beginscope()     {         return new ninjectdependencyscope(kernel.beginblock());     } } 

like darren davies pointed maybe missing attributes. unity takes default in fact constructor parameters, sure if have more 1 ctor, should decorate desired 1 injectionconstructor attribute! hope helps. kind regards