If you're just beginning to program in C#, .Net, and ado.Net then I would
suggest the Step-by-Step series from Microsoft Press. Therer are several
good titles including a book specifically on Ado.Net.
I have posted a couple of links for you below that should get you on the
right path. There are many more out there. Just do a web search for what
you are looking for and peruse the results.