All elements

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;

class Program
{
    static void Main()
    {
        var address = new XElement("address",new XElement("street", "Main St"), new XElement("town", "New York"));
        var customer1 = new XElement("customer1", address);
        var customer2 = new XElement("customer2", address);

        foreach (XElement e in address.Elements())
            Console.WriteLine(e.Name + "=" + e.Value); 
    }
}