LINQ and its features

The standard query operators allow queries to be applied to IEnumerable based information source and allow developers to use query style syntaxes (LINQ expressions) for their codes referring to objects or datasets. The standard query operators are used for LINQ to Objects as well, where they can be applied to all in-memory information. The power of LINQ is in its extensibility.

LINQ can provide implementations that work over SQL data sources. LINQ to SQL translates LINQ-based queries into SQL database queries. A database-specific provider then analyses and transforms these into appropriate query language for the data store, for example, Microsoft SQL Server. Let's see how LINQ can be used over Objects in projects and also over SQL for a database reference.

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