public class Customer
    {
        private int customerId;
        private string company;
        private List<Person> contactPerson;
        private License license;

        public int CustomerId
        {
            get { return customerId; }
            set { customerId = value; }
        }

        public string Company
        {
            get { return company; }
            set { company = value; }
        }

        public List<Person> ContactPerson
        {
            get
            {
                List<Person> contactPersonList = new List<Person>();

                foreach (Person untypedSetting in this.UntypedPerson)
                {
                    contactPersonList.Add(untypedSetting);
                }

                return contactPersonList;
            }
            set { contactPerson = value; }
        }

        public License License
        {
            get { return license; }
            set { license = value; }
        }

        #region nhibernate

        protected IList personUntyped = new ArrayList();

        /// <summary>
        /// Collection of all values including expired and future values.
        /// </summary>
        public IList<Person> UntypedPerson
        {
            get { return new ListWrapper<Person>(personUntyped); }
        }

        /// <summary>
        /// Untyped version of the Settings property for NHibernate compatibility
        /// </summary>
        private IList PersonUntyped
        {
            get { return personUntyped; }
            set { personUntyped = value; }
        }

        #endregion
    }

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0" schema="prosys">
   <class name="Wervis.Send2SMS.Business.Customer, Wervis.Send2SMS.Business" table="GL_Customer">
      <id name="CustomerId" type="Int32" column="CustomerId">
         <generator class="identity" />
      </id>

      <join table="GL_Customer_license">
         <key column="CustomerId" unique="false" />
         <many-to-one name="License" column="LicenseId" not-null="true" unique="true" class="Wervis.Send2SMS.Business.License, Wervis.Send2SMS.Business" />
      </join>

      <property name="Company" column="Company" type="String" />
      
      <bag name="PersonUntyped" table="S2_Customer_Person">
         <key column="CustomerId"/>
         <many-to-many class="Wervis.Send2SMS.Business.Person, Wervis.Send2SMS.Business" column="PersonId"/>
      </bag>

   </class>
</hibernate-mapping>