Understanding Deferred Execution
When the Common Language Runtime (CLR) encounters a LINQ query, the query is not executed immediately. LINQ queries are executed only when they are effectively used. This concept is known as deferred execution and is part of all LINQ providers you encounter, both standard and custom ones. For example, consider the query that is an example in the previous discussion:
Dim query = From prod In products Where prod.UnitsInStock > 10 _ And prod.Discontinued = False Order By prod.UnitPrice Select prod
This query is not executed until you effectively use its result.
For example, iterations cause the query to be executed:
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