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BlockingCollection(T).CopyTo Method

Copies all of the items in the BlockingCollection(T) instance to a compatible one-dimensional array, starting at the specified index of the target array.

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

member CopyTo : 
        array:'T[] * 
        index:int -> unit


Type: T[]

The one-dimensional array that is the destination of the elements copied from the BlockingCollection(T) instance. The array must have zero-based indexing.

Type: System.Int32

The zero-based index in array at which copying begins.


The BlockingCollection(T) has been disposed.


The array argument is null.


The index argument is less than zero.


The index argument is equal to or greater than the length of the array.

The destination array is too small to hold all of the BlockingCcollection elements.

The array rank doesn't match.

The array type is incompatible with the type of the BlockingCollection elements.

CopyTo represents a snapshot of the collection at a precise point in time. If other threads are adding or removing items while CopyTo is executing, then the elements returned by CopyTo might not represent the state of the collection.

.NET Framework

Supported in: 4.6, 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

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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