DataContractSerializer Error using Entity Framework 4.0 with WCF 4.0

Question

I am attempting to retrieve a list of objects from Entity Framework via WCF, but am receiving the following exception:

There was an error while trying to serialize p

Answer 1

For EntityFramework 6.0 I had to change configuration as well:

public class MyContext : DbContext
{
    public MyContext() : base("name=MyContext")
    {
        Configuration.ProxyCreationEnabled = false;
    }
}