INotifyPropertyChange in database project

Hi,

I am new to WPF. I wanted to make a small database project just to learn WPF.

This is a layered application where the business logic will be accessed through WCF service and Business logic will inturn use DAL to access database.

Now my question is, when I create my classes and properties in DAL layer which
will ultimately get binded to UI. DO I need to implement INotifyPropertyChange in DAL or do I need to create separate classes in UI to bind the data ??

Any approach or design suggestion will be very help full.

Thanks.
Regards,
SUmitra