R – nHibernate (a==b) equality

I'm currently using nHibernate and having a problem where two objects loaded separately but representing the same entity in the database do not have equal references.

See the following section of code for example:

CrudRepository<Customer> cr1 = new CrudRepository<Customer>();
Customer c1 = cr1.GetById(new Guid("0D19B0F0-CA41-4D4B-9FB9-9CF600F86A4B"));

CrudRepository<Customer> cr2 = new CrudRepository<Customer>();
Customer c2 = cr2.GetById(new Guid("0D19B0F0-CA41-4D4B-9FB9-9CF600F86A4B"));

if (c1.Equals(c2))
    MessageBox.Show("SAME!");   // True.

if (c1.GetHashCode().Equals(c2.GetHashCode()))
    MessageBox.Show("SAME!");   // True.

if (c1 == c2)
    MessageBox.Show("SAME!");   // False.

My interpretation of the nHibernate documentation lead me to believe that once you override the Equals() and GetHashCode() methods, nHibernate can load entities into the same reference.

This is the line I am referring to:

This only applies if these objects are loaded in two different ISessions,
as NHibernate only guarantees identity
( a == b , the default implementation
of Equals()) inside a single
ISession!

I understand that (c1 == c2) is comparing the references of objects loaded at different times. However, I thought (and hoped) that nHibernate would automatically track pre-loaded references and update them accordingly.

Is this not true?

Or is there something I am doing wrong?

Thanks 🙂

NOTE: I use the singleton pattern to keep the same session throughout the application.

Edit: Every time I perform a CRUD task I use this NHibernateHelper class to get the single instance of the same session builder. This was an example piece of code.

public T GetById(Guid guid)
{
    using (ISession session = NHibernateHelper.OpenSession())
    using (ITransaction transaction = session.BeginTransaction())
    {
        return session.Get<T>(guid);
    }
}

And this is my helper class:

public class NHibernateHelper
{
    private static ISessionFactory sessionFactory;

    private static ISessionFactory SessionFactory
    {
        get
        {
            if (sessionFactory == null)
            {
                var configuration = new Configuration();
                configuration.Configure();
                configuration.AddAssembly(typeof(Customer).Assembly);
                sessionFactory = configuration.BuildSessionFactory();
            }
            return sessionFactory;
        }
    }

    public static ISession OpenSession()
    {
        return SessionFactory.OpenSession();
    }
}