nearly every .NET application needs to handle data that may reside in a wide range of data sources, from relational databases, to XML, to in-memory or disk-persisted objects. Although .NET Framework 2.0 exposes a number of classes to handle these types of data, it lacks a unified approach to handling data from disparate data sources. In other words, until now, you needed to learn a multitude of technologies such as ADO.NET, SQL, XML DOM, XML serialization, etc., to be able to read and update these various data sources. To solve this problem, Microsoft has released a set of technologies called Language-integrated Query (LINQ) that is specific..
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