If you are just starting with this, then there is a simple ADO tutorial here:
Simple ADO.NET Database Read, Insert, Update and Delete using C#.[
^] which should get you started.
Be aware though that using databases is a
big subject - whole books are written about it, and pretty thick ones too! Do not expect this to be trivial - it is easy once you have learnt it, but it is also very, very easy to make dangerous (or annoying) mistakes, especially when you are just starting. I would strongly suggest you read a book on the subject, or follow a course, as there is a heck of a lot to learn! :laugh: