Generic routines

Question

Hi.. Does anyone know of any code sample or could write generic routines for exception handling and database interactions. I will make it more specific. For exception handling ,I want that I write generic routines to check very common exceptions that may occur in any project. Similary for databases I want to add, delete and modify rows into a databse using a dataset. Does anyone know of any book or any code sample that teaches such kind of routines. THanks sups