Jim,

It seems highly probable though, that adding a field to a table is going to also cause code to be added to the business rule tier. So you would end up changing all three tiers.

>However, six months after release a field is added to the customer table in the database. The property design requires that the database by modified (to add the field), the business object be modified (to add the new porperty), and the UI be modified (to display the enw field).
>
>With the Get/Set methods you only need to modify two of the three tiers, because the business object can be coded to try to get whatever field value was requested without restriction. You add the field to the database, and modify the UI to display the field and that's it. No modifications required to the business object.