c# - Can't get Unity Bootstrapper for MVC working -

i have created basic web api project single controller , trying use unity mvc bootstrapper package nuget. unfortunately when try , visit url http://localhost/api/runtypes throws error

{"message":"an error has occurred.","exceptionmessage":"type 'se.flexapplication.webapi.controllers.runtypecontroller' not have default constructor","exceptiontype":"system.argumentexception","stacktrace":" @ system.linq.expressions.expression.new(type type)\r\n @ system.web.http.internal.typeactivator.create[tbase](type instancetype)\r\n @ system.web.http.dispatcher.defaulthttpcontrolleractivator.getinstanceoractivator(httprequestmessage request, type controllertype, func`1& activator)\r\n @ system.web.http.dispatcher.defaulthttpcontrolleractivator.create(httprequestmessage request, httpcontrollerdescriptor controllerdescriptor, type controllertype)"}

my controller class

public class runtypecontroller : apicontroller     {         private readonly istatictypesrepository _statictypesrepository;         private readonly idatamodelconverter _datamodelconverter;         private readonly ibusinessmodelconverter _businessmodelconverter;          public runtypecontroller(istatictypesrepository statictypesrepository, idatamodelconverter datamodelconverter, ibusinessmodelconverter businessmodelconverter)         {             _statictypesrepository = statictypesrepository;             _datamodelconverter = datamodelconverter;             _businessmodelconverter = businessmodelconverter;         }           public runtype[] get()         {             return _statictypesrepository.getruntypes().select(r => _datamodelconverter.convert(r)).toarray();         }          public httpresponsemessage post(runtype type)         {             _statictypesrepository.addruntype(_businessmodelconverter.convert(type));             _statictypesrepository.save();              var response = request.createresponse(system.net.httpstatuscode.created, type);              return response;         }     } 

and unity activator

[assembly: webactivatorex.preapplicationstartmethod(typeof(se.flexapplication.webapi.app_start.unitywebactivator), "start")] [assembly: webactivatorex.applicationshutdownmethod(typeof(se.flexapplication.webapi.app_start.unitywebactivator), "shutdown")]  namespace se.flexapplication.webapi.app_start {     /// <summary>provides bootstrapping integrating unity asp.net mvc.</summary>     public static class unitywebactivator     {         /// <summary>integrates unity when application starts.</summary>         public static void start()          {             var container = unityconfig.getconfiguredcontainer();              filterproviders.providers.remove(filterproviders.providers.oftype<filterattributefilterprovider>().first());             filterproviders.providers.add(new unityfilterattributefilterprovider(container));              dependencyresolver.setresolver(new unitydependencyresolver(container));         }          /// <summary>disposes unity container when application shut down.</summary>         public static void shutdown()         {             var container = unityconfig.getconfiguredcontainer();             container.dispose();         }     } } 

unity config class

public class unityconfig     {         #region unity container         private static readonly lazy<iunitycontainer> container = new lazy<iunitycontainer>(() =>         {             var container = new unitycontainer();             registertypes(container);             return container;         });          /// <summary>         /// gets configured unity container.         /// </summary>         public static iunitycontainer getconfiguredcontainer()         {             return container.value;         }         #endregion          /// <summary>registers type mappings unity container.</summary>         /// <param name="container">the unity container configure.</param>         /// <remarks>there no need register concrete types such controllers or api controllers (unless want          /// change defaults), unity allows resolving concrete type if not registered.</remarks>         public static void registertypes(iunitycontainer container)         {             try             {                 //container.registerinstance<iunitofwork>(new produnitofwork());                  container.registertype<ieventrepository, eventrepository>();                 container.registertype<imodelrepository, modelrepository>();                 container.registertype<isecurityrepository, securityrepository>();                 container.registertype<istatictypesrepository, statictypesrepository>();                  container.registertype<idatamodelconverter, datatomodelconverter>();                 container.registertype<ibusinessmodelconverter, modeltodataconverter>();             }             catch (exception ex)             {                 console.writeline(ex.message);                             }         }     } 

it seems controller isn't picking should using unity dependency resolver constructor injection. i've followed steps on tutorials online. have missed basic?