ParallelEnumerable.ForAll<TSource> Method (ParallelQuery<TSource>, Action<TSource>)

.NET Framework (current version)
 

Invokes in parallel the specified action for each element in the source.

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

public static void ForAll<TSource>(
	this ParallelQuery<TSource> source,
	Action<TSource> action
)

Parameters

source
Type: System.Linq.ParallelQuery<TSource>

The ParallelQuery<TSource> whose elements will be processed by action.

action
Type: System.Action<TSource>

An Action to invoke on each element.

Type Parameters

TSource

The type of elements of source.

Exception Condition
OperationCanceledException

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

ArgumentNullException

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

AggregateException

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

This is an efficient way to process the output from a parallelized query because it does not require a merge step at the end. For more information, see Merge Options in PLINQ or Order Preservation in PLINQ. Because this method produces a side-effect, it can be used to observe the actual order of execution in a parallel query.

Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1
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