WHAT YOU WILL LEARN IN THIS CHAPTER:
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Language-Integrated Query (LINQ) is the query language that is tightly integrated with the programming languages used in the .NET Framework. LINQ enables you to query data from within .NET programming languages in the same way that SQL enables you to query data in a database. In fact, the LINQ syntax has been modeled partially after the SQL language, making it easier for programmers familiar with SQL to get started with LINQ.
LINQ comes in a few different implementations, enabling you to access and query a wide variety of sources, including in-memory data, XML files, .NET DataSets, and databases from your VB.NET or C# code. In the next section you get a brief overview of the main LINQ pillars. The remainder of this chapter focuses on the LINQ syntax and on the ADO.NET Entity Framework (EF), a technology that enables you to work with databases without writing a lot of code. The ADO.NET Entity Framework uses LINQ a lot under ...