Where(TSource) Method (ParallelQuery(TSource), Func(TSource, Int32, Boolean))
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ParallelEnumerable.Where(Of TSource) Method (ParallelQuery(Of TSource), Func(Of TSource, Int32, Boolean))

.NET Framework (current version)
 

Filters in parallel a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function.

Namespace:   System.Linq
Assembly:  System.Core (in System.Core.dll)

<ExtensionAttribute>
Public Shared Function Where(Of TSource) (
	source As ParallelQuery(Of TSource),
	predicate As Func(Of TSource, Integer, Boolean)
) As ParallelQuery(Of TSource)

Parameters

source
Type: System.Linq.ParallelQuery(Of TSource)

A sequence to filter.

predicate
Type: System.Func(Of TSource, Int32, Boolean)

A function to test each element for a condition.

Return Value

Type: System.Linq.ParallelQuery(Of TSource)

A sequence that contains elements from the input sequence that satisfy the condition.

Type Parameters

TSource

The type of the elements of source.

Exception Condition
ArgumentNullException

source or predicate is a null reference (Nothing in Visual Basic).

OperationCanceledException

The query was canceled with the token passed in through WithCancellation.

OverflowException

More than MaxValue elements are enumerated by the query.

AggregateException

One or more exceptions occurred during the evaluation of the query.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1
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