Summary
With the introduction of Language Integrated Query in .NET 3.5 (and C# 3.0), data access to a wide variety of domains has never been easier. Ranging from in-memory querying over IEnumerable<T> collections, over hierarchical XML data, to all sorts of external database formats, LINQ unifies querying over all those data domains. In doing so, it brings a lot of desirable properties to the table:
• Better compile-time checking of queries
• Object-oriented mapping of entities being queried
• Security advantages (for example, protections against SQL injection attacks)
• Rich tooling support, ranging from IntelliSense to mapping tools
• Support for extensibility with custom providers
• No need to learn a plethora of query languages with obscure ...
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