A new web form has been created, NewPolicyHolderAndPolicy.aspx to demonstrate one possible approach. See
The code behind file for this web form makes the required database updates using lines such as:
databaseError.Text = ""; insuranceDB.policyholders.InsertOnSubmit(ph); insuranceDB.SubmitChanges(); p.policyHolderID = ph.policyholderID; insuranceDB.policies.InsertOnSubmit(p); insuranceDB.SubmitChanges();