How to securely handle AES “Key” and “IV” values

Question

If I use AES (System.Security.Cryptography) to simply encrypt and decrypt blob or memo fields in a SQL server, then where do I store the “Key” and “IV” values on the server?

Answer 1

If it is not much the encrypted information, periodically update the password and information from the records encrypted, it can be every day or every hour, for example.