What is ADO.NET and what is an ADO.NET DataSet?

ADO.NET is an improved and expanded version of Active Data Objects (ADO). ADO.NET handles the transformation of XML documents between the documents and associated relational databases. ADO.NET can also create and process in-memory databases called datasets. ADO.NET uses ADO.NET data providers, which are class libraries of ADO.NET services, to communicate with (1) Oracle, (2) SQL server and (3) any OLE DB-compliant DBMS. (The information necessary to write ADO.NET class libraries is publicly available so that other data providers may be written.) An ADO.NET dataset is an in-memory database maintained by ADO.NET. Datasets have all the characteristics, features and functions of regular databases, but an ADO.NET DataSet is disconnected from the database. This allows ADO.NET to manipulate the dataset without changing the associated database until ADO.NET is ready to make changes.

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