BlockingCollection<T>.TakeFromAny Method (BlockingCollection<T>[], T, CancellationToken)

Takes an item from any one of the specified BlockingCollection<T> instances while observing the specified cancellation token.

Namespace:  System.Collections.Concurrent
Assembly:  System (in System.dll)

public static int TakeFromAny(
	BlockingCollection<T>[] collections,
	out T item,
	CancellationToken cancellationToken


Type: System.Collections.Concurrent.BlockingCollection<T>[]

The array of collections.

Type: T

The item removed from one of the collections.

Type: System.Threading.CancellationToken

A cancellation token to observe.

Return Value

Type: System.Int32
The index of the collection in the collections array from which the item was removed.


If the CancellationToken is canceled.


At least one of the underlying collections was modified outside of its BlockingCollection<T> instance.


The collections argument is null.


The count of collections is greater than the maximum size of 62 for STA and 63 for MTA.


The collections argument is a 0-length array or contains a null element, or CompleteAdding has been called on the collection.


At least one of the BlockingCollection<T> instances has been disposed.

A call to TakeFromAny may block until an item is available to be removed. The method will return early with an OperationCanceledException if the token is canceled.

.NET Framework

Supported in: 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1

Windows Phone 8.1, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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