Skip to main content

TypeLoadException: Type 'generatedProxy_5' from assembly 'ProxyBuilder, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' is attempting to implement an inaccessible interface.

A colleague shared with me the following strange error message he got when he tried to use a .NET Standard library I created:

An unhandled exception occurred while processing the request.

TypeLoadException: Type 'generatedProxy_5' from assembly 'ProxyBuilder, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' is attempting to implement an inaccessible interface.

System.Reflection.Emit.TypeBuilder.CreateTypeNoLock()

· TypeLoadException: Type 'generatedProxy_5' from assembly 'ProxyBuilder, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' is attempting to implement an inaccessible interface.

o System.Reflection.Emit.TypeBuilder.CreateTypeNoLock()

o System.Reflection.Emit.TypeBuilder.CreateTypeInfo()

o System.Reflection.DispatchProxyGenerator+ProxyBuilder.CreateType()

o System.Reflection.DispatchProxyGenerator.GenerateProxyType(Type baseType, Type interfaceType)

o System.Reflection.DispatchProxyGenerator.GetProxyType(Type baseType, Type interfaceType)

o System.Reflection.DispatchProxyGenerator.CreateProxyInstance(Type baseType, Type interfaceType)

o System.Reflection.DispatchProxy.Create<T, TProxy>()

o System.ServiceModel.Channels.ServiceChannelProxy.CreateProxy<TChannel>(MessageDirection direction, ServiceChannel serviceChannel)

o System.ServiceModel.Channels.ServiceChannelFactory.CreateProxy<TChannel>(MessageDirection direction, ServiceChannel serviceChannel)

o System.ServiceModel.Channels.ServiceChannelFactory.CreateChannel<TChannel>(EndpointAddress address, Uri via)

o System.ServiceModel.ChannelFactory<TChannel>.CreateChannel(EndpointAddress address, Uri via)

o System.ServiceModel.ChannelFactory<TChannel>.CreateChannel()

o System.ServiceModel.ClientBase<TChannel>.CreateChannel()

o System.ServiceModel.ClientBase<TChannel>.CreateChannelInternal()

o System.ServiceModel.ClientBase<TChannel>.get_Channel()

o IRD3Service.IRD3ServiceClient.MbCoreGetIdentificerendeEenheidAsync(int idIe) in Reference.cs

Inside this library I’m doing a WCF call to get some data from a backend service. WCF internally generates a proxy for the WCF client through the ProxyBuilder and it is this ProxyBuilder that started to complain…

The problem seems to be that I generated all my proxy types as internal(which should be a good thing). But the ProxyBuilder does not agree with me.

Some research (thanks Google!) brought me to the following possible solutions:

  • Change all proxy types from internal to public
  • Add an InternalsVisibleToAttribute(“ProxyBuilder”) to the library

I tried the second approach and it worked! Up to the next problem…

Labels:

Popular posts from this blog

Azure DevOps/ GitHub emoji

I’m really bad at remembering emoji’s. So here is cheat sheet with all emoji’s that can be used in tools that support the github emoji markdown markup: All credits go to rcaviers who created this list.
Read more

Kubernetes–Limit your environmental impact

Reducing the carbon footprint and CO2 emission of our (cloud) workloads, is a responsibility of all of us. If you are running a Kubernetes cluster, have a look at Kube-Green . kube-green is a simple Kubernetes operator that automatically shuts down (some of) your pods when you don't need them. A single pod produces about 11 Kg CO2eq per year( here the calculation). Reason enough to give it a try! Installing kube-green in your cluster The easiest way to install the operator in your cluster is through kubectl. We first need to install a cert-manager: kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.14.5/cert-manager.yaml Remark: Wait a minute before you continue as it can take some time before the cert-manager is up & running inside your cluster. Now we can install the kube-green operator: kubectl apply -f https://github.com/kube-green/kube-green/releases/latest/download/kube-green.yaml Now in the namespace where we want t
Read more

DevToys–A swiss army knife for developers

As a developer there are a lot of small tasks you need to do as part of your coding, debugging and testing activities.  DevToys is an offline windows app that tries to help you with these tasks. Instead of using different websites you get a fully offline experience offering help for a large list of tasks. Many tools are available. Here is the current list: Converters JSON <> YAML Timestamp Number Base Cron Parser Encoders / Decoders HTML URL Base64 Text & Image GZip JWT Decoder Formatters JSON SQL XML Generators Hash (MD5, SHA1, SHA256, SHA512) UUID 1 and 4 Lorem Ipsum Checksum Text Escape / Unescape Inspector & Case Converter Regex Tester Text Comparer XML Validator Markdown Preview Graphic Color B
Read more