ADO.NET -- Offline and On Tap

Here. "In the .NET* Framework, rich clients can bring database servers to their knees, just like Web-based applications. But with the disconnected nature of ADO.NET, your rich clients can manipulate and analyze database data without impacting the database server. Once you have the data in the rich client, you can do high-performance analysis of the data—including sorting, filtering, and querying—without expensive server calls. In this article we will show you how to use DataSet, DataView, and XmlDataDocument to make your rich clients work with database data in a disconnected way."