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BlockingCollection<T>.TryTake Method (T%, Int32, CancellationToken)

Tries to remove an item from the BlockingCollection<T> in the specified time period while observing a cancellation token.

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

public bool TryTake(
	out T item,
	int millisecondsTimeout,
	CancellationToken cancellationToken


Type: T%
The item to be removed from the collection.
Type: System.Int32
The number of milliseconds to wait, or Infinite (-1) to wait indefinitely.
Type: System.Threading.CancellationToken
A cancellation token to observe.

Return Value

Type: System.Boolean
true if an item could be removed from the collection within the specified time; otherwise, false.


The CancellationToken has been canceled.


The BlockingCollection<T> has been disposed or the underlying CancellationTokenSource has been disposed.


millisecondsTimeout is a negative number other than -1, which represents an infinite time-out.


The underlying collection was modified outside this BlockingCollection<T> instance.

The order in which an item is removed depends on the type of collection used to create the BlockingCollection<T> instance. When you create a BlockingCollection<T> object, you can specify the type of collection to use. For example, you could specify a ConcurrentConcurrentQueue object for first in, first out (FIFO) behavior, or a ConcurrentStack<T> object for last in, first out (LIFO) behavior. You can use any collection class that implements the IProducerConsumerCollection<T> interface. The default collection type for BlockingCollection<T> is ConcurrentQueue<T>.

.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.

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