Start experimenting with the differences
between query syntax and method syntax, as well as with the different query expressions available. A lot
of this will be useful in the upcoming chapters.
Summary
This chapter gave you with a first-hand look at LINQ queries, their concepts, and the available syntax
options. You got a detailed look at the three actions that make up a query operation: the data source,
the query expression, and the execution of the query (and the different types of query execution, such as
deferred and immediate). Each is a distinct and separate action critical to the success of the LINQ query.
You also looked at SQL syntax and saw how its execution is likened to LINQ syntax. Then you explored
LINQ query concepts, from specifying the data source to filtering, grouping, and selecting (projecting) a
query expression. You also tackled the different query expressions, the use of var versus IEnumerable,
and the difference between query syntax and method syntax and how they are related and used.
In Chapter 4 you??™ll take an in-depth look at the standard query operators, putting the final touches on
your basic understanding of LINQ.
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