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C Sharp Programming/Keywords/in
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Keywords in
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The in keyword identifies the collection to enumerate in a foreach loop.
The in keyword may also be used in a query, e.g., 'from item in dataset'. Immediately following the contextual keyword from is a range variable representing one item in the dataset. The dataset to be queried is defined immediately following the contextual keyword in. See also ascending, descending, in, orderby, select, and where.