Illustrate ADO.NET Architecture

They are:

• Data Provider – Establishes connection with different databases like Oracle, MS Access and SQL Server. Data Provider contains the following:

o Connection –to establish connectivity with database
o Command Object – to access stored procedures of the database
o Data Adapter – to pass data fetched from the database to the dataset for caching and making the data available even when the connection gets disconnected.
o Datareader – to read data from database

• Dataset – Contains cached data fetched from the different databases. The data is fetched and maintained with the help of Data Adapter.

Communication between these components in ADO.NET architecture is pictorially represented below:

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