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Concept, capabilities and features ADO.NET

It is data-access technology, primarily disconnected and designed to provide efficient, scalable dataaccess.
The disconnected data is represented within aDataSetobject.
A data provider is a set of classes that provide access to databases. The main components of data provider are:
Connection
Command
DataReader
DataAdapter

Visual Studio .NET includes two data providers:
SQL Data Provider
OleDb Data Provider

Two additional data providers are included in Visual Studio .NET 2003:
ODBC Data Provider
Oracle Data Provider