using (ObjectScope.New(customer, autoCommit: false))
{
    customer.CompanyName += "Test";
    customer.Orders[0].ShipPostalCode = "11111";
    customer.Orders.RemoveAt(1);

    var o = new Order();
    o.CustomerId = customer.Id;
    o.ShipPostalCode = "19115";
    o.GenerateKey();
    customer.Orders.Add(o);

    // A developer may access original instance to compare property values
    // var hasNewOrders = customer.Old().Orders.Count == customer.Orders.Count;

    // A developer may choose to rollback at any point thus wiping all the changes
    // and resetting the object state
    //customer.Rollback();

    // Since autoCommit option is set to false, a developer must call Commit method
    // in order to preserve object changes; transaction will also be completed at this point
    customer.Commit();
}