Designer displays the following error if there is any event defined for SelectionChanged (even if it's an empty function or an empty string for the event name). Also, my events tab for the combo editor displays no events just the properties although I do get the events showing in intellisense in the xaml designer.

We are seeing this on both of the two development machines we upgraded:

System.InvalidOperationException

Operation is not valid due to the current state of the object.

   at Microsoft.MetadataReader.MetadataOnlyTypeDef.MakeGenericType(Type[] argTypes)

   at Microsoft.VisualStudio.Shell.Design.TypeWrapper.MakeGenericType(Type[] typeArguments)

   at Microsoft.MetadataReader.ProxyGenericType.GetResolvedTypeWorker()

   at Microsoft.MetadataReader.TypeProxy.GetResolvedType()

   at Microsoft.MetadataReader.TypeProxy.GetHashCode()

   at Microsoft.Windows.Design.Metadata.ReflectionMetadataContext.GetTypeForReflectableType(Reflectable`1 reflectableType)

   at MS.Internal.Metadata.ClrType.GetTypeMetadata(Type type)

   at MS.Internal.Metadata.ClrEvent.get_EventHandlerType()

   at MS.Internal.Design.Metadata.ReflectionEventNode.get_PropertyType()

   at MS.Internal.Design.DocumentModel.DocumentTrees.Markup.XamlProperty.get_PropertyType()

   at MS.Internal.Design.DocumentModel.DocumentTrees.Markup.XamlProperty.get_IsComposite()

   at Microsoft.Windows.Design.DocumentModel.MarkupDocumentManagerBase.<EnumerateTreeTypes>d__20.MoveNext()

   at Microsoft.Windows.Design.DocumentModel.MarkupDocumentManagerBase.<EnumerateTreeTypes>d__20.MoveNext()

   at Microsoft.Windows.Design.DocumentModel.MarkupDocumentManagerBase.<EnumerateDamageTypes>d__31.MoveNext()

   at Microsoft.Windows.Design.DocumentModel.MarkupDocumentManagerBase.ReferenceUpdater.EnsureReferences(IEnumerable`1 types)

   at Microsoft.Windows.Design.DocumentModel.MarkupDocumentManagerBase.ReferenceUpdater.Microsoft.Windows.Design.DocumentModel.IDocumentTreeConsumer.HandleMessage(DocumentTreeCoordinator sender, MessageKey key, MessageArguments args)

   at Microsoft.Windows.Design.DocumentModel.MarkupDocumentManagerBase.CancelableDocumentTreeCoordinator.RouteMessage[T](IDocumentTreeConsumer consumer, MessageKey`1 key, T args)

   at Microsoft.Windows.Design.DocumentModel.DocumentTreeCoordinator.SendMessage[T](MessageKey`1 key, T args, Boolean isPrivateMessage)

   at Microsoft.Windows.Design.DocumentModel.DocumentTreeCoordinator.SendMessage[T](MessageKey`1 key, T args)

   at Microsoft.Windows.Design.DocumentModel.DocumentTreeCoordinator.ReportDamage(IDocumentTreeProducer tree, Damage damage)

   at Microsoft.Windows.Design.DocumentModel.MarkupProducer.Update()

   at Microsoft.Windows.Design.DocumentModel.MarkupProducer.HandleMessage(DocumentTreeCoordinator sender, MessageKey key, MessageArguments args)

   at Microsoft.Windows.Design.DocumentModel.MarkupProducer.Microsoft.Windows.Design.DocumentModel.IDocumentTreeConsumer.HandleMessage(DocumentTreeCoordinator sender, MessageKey key, MessageArguments args)

   at Microsoft.Windows.Design.DocumentModel.DocumentTreeCoordinator.SendMessage[T](MessageKey`1 key, T args, Boolean isPrivateMessage)

   at Microsoft.Windows.Design.DocumentModel.DocumentTreeCoordinator.QueuedMessage`1.Microsoft.Windows.Design.DocumentModel.IQueuedMessage.Invoke()

   at Microsoft.Windows.Design.DocumentModel.DocumentTreeCoordinator.ProcessQueuedMessages(Object state)

   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)

   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)