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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

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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