Essential C# 8.0, 7th Edition

16. 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 to C# 3.0. With query expressions, many standard ...