The Query Pattern
Now that you’ve seen the various standard query operators than come with LINQ and their query expression counterparts (with varying mileage in C# and Visual Basic), we can make a few more remarks about the query pattern.
The C# language specification refers to the concrete implementation of the querying operators that can be targeted by a query expression as the query pattern. Concretely, it means that any set of objects that happens to have (some) operators such as SelectMany, Where, Select, OrderBy, and so on can be addressed by using the query expression syntax.
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