Business Logic to LINQ

Question

I was hoping someone could point me to a good article about adding business logic to LINQ.  Right now I've seen multiple ways to do it with partial classes, however, in a development environment where the database seems to constantly be changing the only way to update LINQ is to delete/add the tables from the columns other than manually editing every change.  Is there a better solution or possibly a workaround that I'm unware of?