ADO.NET Objects

ADO.NET supports two types of development environments: connected and disconnected (see Figure 17.1). Each environment includes its own set of classes to support the intended functionality.

Figure 17.1. Connected and disconnected classes in ADO.NET.
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The connected environment classes provide read-only data retrieval from data sources. It also enables developers to execute commands against the data source to make changes to it—provided that such functionality is supported by the data source. The connected environment basically works with a physical data store to which a connection is maintained.

The disconnected ...

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