One to many example 2 of 4

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="TstDBConnection.Entities" assembly="TstDBConnection">
  <class name="Cup" table="Cup">
    <id name="Id" column="Id">
      <generator class="guid.comb"/>
    </id>
    <property name="Name" column="Name"></property>
  </class>
</hibernate-mapping>

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="TstDBConnection.Entities" assembly="TstDBConnection">
  <class name="CupBox" table="CupBox">
    <id name="Id" column="Id">
      <generator class="guid.comb"/>
    </id>
    <property name="Name" column="Name"></property>
    <set name="Cups" lazy="true" fetch="join" cascade="all-delete-orphan">
      <key column="CupBoxId"/> <!--Cup table column-->
      <one-to-many class="Cup"/> <!--it stands for get related info from cup.hbm.xml-->
    </set>
  </class>
</hibernate-mapping>

namespace TstDBConnection.Entities
{
    public class CupBox
    {
        public virtual Guid Id { get; set; }
        public virtual string Name { get; set; }
        public virtual Iesi.Collections.Generic.ISet<Cup> Cups { get; set; }
    }
}

namespace TstDBConnection.Entities
{
    public class Cup
    {
        public virtual Guid Id { get; set; }
        public virtual string Name { get; set; }
    }
}

        public static void TestOne2Many(ISessionFactory sessionFactory)
        {
            using (ISession session = sessionFactory.OpenSession())
            {
                Cup cup = new Cup() { Name = "Coffee Cup" };
                CupBox cupbox = new CupBox()
                {
                    Cups = new Iesi.Collections.Generic.HashedSet<Cup>() { cup },
                    Name = "Coffee CupBox"
                };
                var id = session.Save(cupbox);
                session.Flush();
                
                var query = from leafT in session.Query<CupBox>() select leafT;
                IList<CupBox> employees = query.ToList();
                CupBox cb = employees[0];
                List<Cup> cups = cb.Cups.ToList<Cup>();
            }
        }

        static void Main(string[] args)
        {
            log4net.Config.XmlConfigurator.Configure(); // log4net
            Configuration configuration = new Configuration();
            configuration.Configure();
            ISessionFactory sessionFactory = configuration.BuildSessionFactory();

            TestOne2Many(sessionFactory);

            sessionFactory.Close();
        }