Question

I’m using Castle Windsor 3.1.0 in an ASP .NET 4 MVC application, which is giving me an exception in the Application_Start event when container.Register is called.

The exception is “The invoked member is not supported in a dynamic assembly.”. Here’s the stack trace:

[NotSupportedException: The invoked member is not supported in a dynamic assembly.]
   System.Reflection.Emit.InternalAssemblyBuilder.GetExportedTypes() +56
   Castle.Core.Internal.ReflectionUtil.GetAvailableTypes(Assembly assembly, Boolean includeNonExported) in c:\BuildAgent\work\5b096cace0fecb1f\src\Castle.Windsor\Core\Internal\ReflectionUtil.cs:165
   Castle.MicroKernel.Registration.FromAssemblyDescriptor.<SelectedTypes>b__0(Assembly a) in c:\BuildAgent\work\5b096cace0fecb1f\src\Castle.Windsor\MicroKernel\Registration\FromAssemblyDescriptor.cs:56
   System.Linq.<SelectManyIterator>d__14`2.MoveNext() +238
   Castle.MicroKernel.Registration.FromDescriptor.Castle.MicroKernel.Registration.IRegistration.Register(IKernelInternal kernel) in c:\BuildAgent\work\5b096cace0fecb1f\src\Castle.Windsor\MicroKernel\Registration\FromDescriptor.cs:160
   Castle.MicroKernel.Registration.BasedOnDescriptor.Castle.MicroKernel.Registration.IRegistration.Register(IKernelInternal kernel) in c:\BuildAgent\work\5b096cace0fecb1f\src\Castle.Windsor\MicroKernel\Registration\BasedOnDescriptor.cs:530
   Castle.MicroKernel.DefaultKernel.Register(IRegistration[] registrations) in c:\BuildAgent\work\5b096cace0fecb1f\src\Castle.Windsor\MicroKernel\DefaultKernel.cs:506
   Castle.Windsor.WindsorContainer.Register(IRegistration[] registrations) in c:\BuildAgent\work\5b096cace0fecb1f\src\Castle.Windsor\Windsor\WindsorContainer.cs:483
   ProductX.Web.Windsor.Installers.ControllerInstaller.Install(IWindsorContainer container, IConfigurationStore store) in C:\TeamProjects\CompanyX.ProductX\Mainline\Admin\ProductX.Web\Windsor\Installers\ControllerInstaller.cs:24
   Castle.Windsor.Installer.AssemblyInstaller.Install(IWindsorContainer container, IConfigurationStore store) in c:\BuildAgent\work\5b096cace0fecb1f\src\Castle.Windsor\Windsor\Installer\AssemblyInstaller.cs:56
   Castle.Windsor.WindsorContainer.Install(IWindsorInstaller[] installers, DefaultComponentInstaller scope) in c:\BuildAgent\work\5b096cace0fecb1f\src\Castle.Windsor\Windsor\WindsorContainer.cs:319
   Castle.Windsor.WindsorContainer.Install(IWindsorInstaller[] installers) in c:\BuildAgent\work\5b096cace0fecb1f\src\Castle.Windsor\Windsor\WindsorContainer.cs:452
   ProductX.Web.MvcApplication.InitializeWindsor() in C:\TeamProjects\CompanyX.ProductX\Mainline\Admin\ProductX.Web\Global.asax.cs:41
   ProductX.Web.MvcApplication.Application_Start() in C:\TeamProjects\CompanyX.ProductX\Mainline\Admin\ProductX.Web\Global.asax.cs:25

[HttpException (0x80004005): The invoked member is not supported in a dynamic assembly.]
   System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +9171773
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +131
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +194
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +339
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +253

[HttpException (0x80004005): The invoked member is not supported in a dynamic assembly.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9090876
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +97
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +256

Here’s how I’m calling Register:

container.Register(Classes.FromThisAssembly().BasedOn<IController>().LifestyleTransient());

When I build the application in Debug mode, it’s fine. When I build in Release mode, the exception above occurrs. I can’t find anything about this error through Google. My suspicion is that some .NET 4 restrictions were introduced with how reflection is done on dynamic assemblies, which is being introduced in this situation as a Release build optimisation.

Any idea anyone?

Answer 1

Looks like you’re getting a dynamic assembly being emitted (somehow). Try adding a filter to ignore dynamic assemblies. This should work:

container.Register(Classes.FromThisAssembly().Where(t => !t.Assembly.IsDynamic).BasedOn<IController>().LifestyleTransient());