EF4: The closed type 'xxxx' does not have a corresponding element settable property

I'm using this guide to call开发者_StackOverflow中文版 stored procedure in my projet which using EF4 EDMX through WCFDataservice.

I have mapped a complex type to return items from the stored procedure. If I call the method by http, the XML'result is perfect, but when I call with this code:

public void Test()
{
    Uri methodUri = new Uri(entities.BaseUri + "/GetCase");
    List<CaseFiltered> result = entities.Execute<CaseFiltered>(methodUri).ToList();
}

I get this exception The closed type CaseFiltered does not have a corresponding element settable property.

I had try this solution but it doesn't work for me.

Have you a solution?

Thank you!

Ok I find the solution according this article

Actually, you did everything right...However, our client library does not support materialization of a collection of complex types directly (yet). If you look at the output of the service op, you would see a list of tag, rather than an Atom Feed.

My workaround: I'm using Case entities, not the CaseFiltered complex type