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Hi Prabhakar,
Please refer the below links
http://msdn.microsoft.com/en-us/data/dd363565.aspx
http://vb.net-informations.com/ado.net-dataproviders/ado.net-dataproviders-tutorial.htm
http://www.csharp-station.com/Tutorial/AdoDotNet/lesson01
Thanks
If this post helps you mark it as answer
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A .NET Framework come up with ADO.NET data providers which is used for connecting to a database, executing commands, and retrieving results from various databases.
They are.NET Framework Data Provider for SQL Server,for OLE DB, for ODBC, for Oracle
Command,Connection,DAtaReader and DataAdapter are the core objects of any provider.
Hope you understood.
Check this is correct answer if it is.