[dba-VB] Reading / writing SQL Server rows with ADO.Net (or something)

I need to read blocks of data from tables in SQL Server, use values in 
the rows then update those rows and write back to SQL Server.  I need to 
do this programmatically, not in a control on a form.  does anyone have 
any example code for setting up the various ADO.Net objects, fetching 
rows of data from SQL Server, updating that data and writing it back to 
SQL Server?
-- 
John W. Colby
www.ColbyConsulting.com