using System;

public class ComplexClass

{

    public void Main()

    {

    }

}

​

public class Customer {

​

    public Customer()

    {

        this.ShippingAddress = new Address();

        this.BillingAddress = new Address();

    }

    public string FirstName { get; set; }

    public string LastName { get; set; }

    public Address ShippingAddress { get; set; }

    public Address BillingAddress { get; set; }

​

}

​

public class Address {

    public string Street {get; set;}

    public string City {get; set;}

    public string ZIP {get; set;}

}    

​