Query keywords (C# Reference)

This section contains the contextual keywords used in query expressions.

In this section

from: Specifies a data source and a range variable (similar to an iteration variable).
where: Filters source elements based on one or more Boolean expressions separated by logical AND and OR operators (&& or ||).
select: Specifies the type and shape that the elements in the returned sequence have when the query executes.
group: Groups query results according to a specified key value.
into: Provides an identifier that serves as a reference to the results of a join, group, or select clause.
orderby: Sorts query results in ascending or descending order based on the default comparer for the element type.
join: Joins two data sources based on an equality comparison between two specified matching criteria.
let: Introduces a range variable to store subexpression results in a query expression.
in: Contextual keyword in a join clause.
on: Contextual keyword in a join clause.
equals: Contextual keyword in a join clause.
by: Contextual keyword in a group clause.
ascending: Contextual keyword in an orderby clause.
descending: Contextual keyword in an orderby clause.

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