Original Address.cs

// Address: Before
public class Address {
  public Guid Id { get; set; }
  public string Line1 { get; set; }
  public string Line2 { get; set; }
  public string Line3 { get; set; }
  public string City { get; set; }
  public string Postcode { get;set; }
  public int CountryId { get; set; }
}

// Address: After
public class Address {
  public Guid Id { get; set; }
  public string Line1 { get; set; }
  public string Line2 { get; set; }
  public string Line3 { get; set; }
  public string City { get; set; }
  public string Postcode { get;set; }
  public string CountryIso { get; set; }
}