This self-guided resource allows you work with strings, string handling is a very common requirement in a lot of programs, it is used on almost all programs where the user has to enter text. Learning these functions will enable you to write a much wider variety of applications.
This self-guided resource will walk you through the steps to access an Access database from a Winforms project. It is worth noting that this is one of many techniques available to do this. It uses an engine called JET or ACE (depending on your PC setup) and is fairly simple to follow. You will end up with a separate database which you can access and alter from your winforms applications