While going through the Astoria sample in DO 4.3 RC3 I'm getting this error: The server encountered an error processing the request. The exception message is 'The property 'Type' is not a valid property name for type 'Server.Model.EntityBase'. Please specify a valid property name.'. See server logs for more details. The exception stack trace is: at System.Data.Services.IgnorePropertiesAttribute.GetProperties(Type type, Boolean inherit, BindingFlags bindingFlags) at System.Data.Services.Providers.ReflectionServiceProvider.BuildTypeProperties(ResourceType parentResourceType, IDictionary2 knownTypes, IDictionary2 childTypes, Queue1 unvisitedTypes, IEnumerable1 entitySets) at System.Data.Services.Providers.ReflectionServiceProvider.PopulateMetadata(IDictionary2 knownTypes, IDictionary2 childTypes, IDictionary2 entitySets) at System.Data.Services.DataService1.CreateProvider() at System.Data.Services.DataService1.HandleRequest() at System.Data.Services.DataService1.ProcessRequestForMessage(Stream messageBody) at SyncInvokeProcessRequestForMessage(Object , Object[] , Object[] ) at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs) at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc) at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc& rpc) at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet) Any idea why this is happening?

Locate file .../AstoriaSample/Server.Model/EntityBase.cs, and change line with IgnoreProperties into this:

[IgnoreProperties("PersistenceState", "Session", "Item", "TypeInfo", "Key", "VersionInfo", "IsRemoved")]

as you can see you must change string "Type" with "TypeInfo", this is because DO4.3 rename property "Type" into "TypeInfo" but forgot to change astoria sample i think :-)

I think this little change for Astoria sample should be fixed locally, just make somewhere some description (maybe mine) how to fix and run Astoria sample with DO4.3 :-)