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

Adds the specified item to any one of the specified BlockingCollection<T> instances.

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

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


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

The array of collections.

Type: T

The item to be added to 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 to which the item was added.


If the CancellationToken is canceled.


At least one underlying collection didn't accept the item.


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 at least one of collections has been marked as complete for adding.


At least one of the BlockingCollection<T> instances has been disposed, or the CancellationTokenSource that created cancellationToken has been disposed.

If a bounded capacity was specified when all of the BlockingCollection<T> instances were initialized, a call to AddToAny may block until space is available in one of the collections to store the provided item. This method may return before the item is added to any collection if the cancellationToken is canceled before space is available.

.NET Framework

Supported in: 4.5.2, 4.5.1, 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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