I am using a BO with multiple rows taken from the Database Table and want to ensure that I do not have any duplicates (On the BO) before I save.

If I was doing this against the database Table, I would issue someting like:

Select Country , Count(Country) as MyCount from MyTable Group by Country                 and then Test that myCount was not greater than 1

Is there any similar construct I can use for Business Object   i.e. be able to search through the BO and let it throw up any duplicates.

Sorry, but I am affraid I have no expertise on the subject to give you a more accurate answer.

Maybe someone else will chime in and help you with that. You could also run a test on different approaches and decide which goes better for your conditions.