If models are correctly related you can easily load related data using EntityFramework. You have three options to chose from: lazy loading, eager loading and explicit loading.
Models used in examples:
public class Company
{
public int Id { get; set; }
public string FullName { get; set; }
public string ShortName { get; set; }
// Navigation properties
public virtual Person Founder { get; set; }
public virtual ICollection<Address> Addresses { get; set; }
}
public class Address
{
public int Id { get; set; }
public int CompanyId { get; set; }
public int CountryId { get; set; }
public int CityId { get; set; }
public string Street { get; set; }
// Navigation properties
public virtual Company Company { get; set; }
public virtual Country Country { get; set; }
public virtual City City { get; set; }
}