Essential C# 12.0, 8th Edition

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LINQ with Query Expressions

The end of Chapter 15 showed a query using standard query operators for GroupJoin(), SelectMany(), and Distinct(). The result was a statement that spanned multiple lines and was rather more complex and difficult to comprehend than statements typically written using only features of earlier versions of C#. Modern programs, which manipulate rich data sets, often require such complex queries; it would therefore be advantageous if the language made them easier to read. Domain-specific query languages such as SQL make it much easier to read and understand a query but lack the full power of the C# language. That is why the C# language designers added query expressions syntax.¹ With query expressions, many standard query ...