restrictions.md

LINQ - Restriction Operators

The where clause of a LINQ query restricts the output sequence. Only the elements that match a condition are added to the output sequence.

LINQ query structure

This sample uses where to find all elements of an array less than 5. It demonstrates the components of a query, including a where clause that filters for small numbers.

Filter elements on a property

This sample uses where to find all products that are out of stock. Its where clause examines a property of the items in the input sequence.

Filter elements on multiple properties

This sample uses where to find all products that are in stock and cost more than 3.00 per unit.

Examine a sequence property of output elements

This sample uses where to find all customers in Washington and then uses the resulting sequence to drill down into their orders.

Filter elements based on position

This sample demonstrates an indexed Where clause that returns digits whose name is shorter than their value.

Notice that this final example shows the Where method rather than the where clause. The two forms are equivalent.

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