/// <summary> 
        /// 
        /// </summary> 
        /// <param name="oldPerson"></param> 
        /// <param name="newPerson"></param> 
        private void CreatePerson( Person oldPerson, Person newPerson ) 
        { 
            Address address; 
        
            if ( oldPerson.Address is WorkAddress ) 
                address = new WorkAddress(); 
            else 
                address = new HomeAddress(); 
        
            newPerson.Name = oldPerson.Name; 
            newPerson.Address = address; 
        
            if ( oldPerson.Address != null ) 
            { 
                if ( oldPerson.Address is HomeAddress ) 
                { 
                    ( newPerson.Address as HomeAddress ).HouseNumber = 
                        ( oldPerson.Address as HomeAddress ).HouseNumber; 
        
                    if ( oldPerson.Address is WorkAddress ) 
                    { 
                        ( newPerson.Address as WorkAddress ).PhoneNumber = 
                            ( oldPerson.Address as WorkAddress ).PhoneNumber; 
                    } 
                } 
                else 
                { 
                    ( newPerson.Address as HomeAddress ).HouseNumber = 
                        "Service Receive object type of: " + oldPerson.Address.GetType().Name; 
                } 
            } 
            else 
            { 
                ( newPerson.Address as HomeAddress ).HouseNumber = "987654 ELM STREET"; 
            } 
        } 
    } 
        
    /// <summary> 
    /// 
    /// </summary> 
    [XmlRoot( Namespace = "urn:emp:data" )] 
    public class Person 
    { 
        public string Name; 
        public Address Address; 
    } 
        
    /// <summary> 
    /// 
    /// </summary> 
    [XmlRoot( Namespace = "urn:emp:data" )] 
    [XmlInclude( typeof( HomeAddress ) )] 
    [XmlInclude( typeof( WorkAddress ) )] 
    public abstract class Address 
    { 
    } 
        
    /// <summary> 
    /// 
    /// </summary> 
    [XmlRoot( Namespace = "urn:emp:data" )] 
    [XmlInclude( typeof( WorkAddress ) )] 
    public class HomeAddress : Address 
    { 
        public string HouseNumber; 
    } 
        
    /// <summary> 
    /// 
    /// </summary> 
    [XmlRoot( Namespace = "urn:emp:data" )] 
    public class WorkAddress : HomeAddress 
    { 
        public string PhoneNumber; 
    } 
}