articles about data access using System.Data.SqlClient namespace?

Aaarrgghhhhhhh, still searchin' for a nice step-by-step article to learn data access (all insert delete update commands) with the SQL Server .NET Data Provider found in [System.Data.SqlClient] namespace...

Can anyone plz help me to find it?these might help?
http://samples.gotdotnet.com/quickstart/howto/doc/adoplus/ADOPlusOverview.aspx
http://www.stylusinc.net/technology/microsoft/ado.shtml
http://msdn.microsoft.com/library/en-us/cpref/html/frlrfSystemDataSqlClientSqlConnectionClassTopic.asp?frame=true
http://msdn.microsoft.com/data/downloads/samples/default.aspx

Also
Check out the Data Access Application Block for .NET, it creates a wrapper around SqlClient class for somewhat easier use.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html/daab-rm.asp