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ParallelEnumerable.AsParallel(Of TSource) Method (Partitioner(Of TSource))

Enables parallelization of a query, as sourced by a custom partitioner that is responsible for splitting the input sequence into partitions.

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

'Declaration
<ExtensionAttribute> _
Public Shared Function AsParallel(Of TSource) ( _
	source As Partitioner(Of TSource) _
) As ParallelQuery(Of TSource)

Type Parameters

TSource

The type of elements of source.

Parameters

source
Type: System.Collections.Concurrent.Partitioner(Of TSource)

A partitioner over the input sequence.

Return Value

Type: System.Linq.ParallelQuery(Of TSource)
The source as a ParallelQuery to bind to ParallelEnumerable extension methods.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type Partitioner(Of TSource). When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

ExceptionCondition
ArgumentNullException

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

The source partitioner's GetOrderedPartitions method is used when ordering is enabled, whereas the partitioner's GetPartitions is used if ordering is not enabled (the default). The source partitioner's GetDynamicPartitions and GetDynamicOrderedPartitions are not used. For more information and examples, see Custom Partitioners for PLINQ and TPL.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1
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