EntityEntry.GetOriginalValues(includeOwnedTypes: true);
EntityEntry.GetCurrentValues(includeOwnedTypes: true);
EntityEntry.GetDatabaseValues(includeOwnedTypes: true);
EntityEntry.Reload(includeOwnedTypes: true);

EntityEntry<TEntity>.Property(e => e.CustomerName.FirstName);
EntityEntry<TEntity>.Property(e => e.Addresses[2].City);

   //  the owned type
    public class CustomerName
    {
        public CustomerName()
        {
        }
        public string FirstName { get; set; }
        public string MiddleName { get; set; }
        public string LastName { get; set; }
    }

    public partial class Customer
    {
        public Customer()
        {
            CustomerAddress = new HashSet<CustomerAddress>();
            SalesOrderHeader = new HashSet<SalesOrderHeader>();
            CustomerName = new CustomerName();
        }

        public int CustomerId { get; set; }
        public bool NameStyle { get; set; }
        public string Title { get; set; }
        // this is the property with the owned type
        public CustomerName CustomerName { get; set; }

        public ICollection<CustomerAddress> CustomerAddress { get; set; }
        public ICollection<SalesOrderHeader> SalesOrderHeader { get; set; }
    }

      //  the code for update (first name is different in the current and original owned type version )
        public void UpdateCustomer(Customer customer)
        {
            customer.ModifiedDate = DateTime.Now;
            var orig = this.GetOriginal<Customer>();
            var entry = DB.Customer.Attach(customer);
           // the change is not detected (although properties are different)
            entry.OriginalValues.SetValues(orig);
        }

        public void UpdateCustomer(Customer customer)
        {
            customer.ModifiedDate = DateTime.Now;
            var orig = this.GetOriginal<Customer>();
            var entry = DB.Customer.Attach(customer);
            // change property on the owned type after attaching
            customer.CustomerName.FirstName = "Dummy Name";
            entry.OriginalValues.SetValues(orig);
        }