HashSet<T>.CopyTo Method (T[], Int32, Int32)

Copies the specified number of elements of a HashSet<T> object to an array, starting at the specified array index.

Namespace:  System.Collections.Generic
Assembly:  System.Core (in System.Core.dll)

public void CopyTo(
	T[] array,
	int arrayIndex,
	int count


Type: T[]

The one-dimensional array that is the destination of the elements copied from the HashSet<T> object. The array must have zero-based indexing.

Type: System.Int32

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

Type: System.Int32

The number of elements to copy to array.


array is null.


arrayIndex is less than 0.


count is less than 0.


arrayIndex is greater than the length of the destination array.


count is greater than the available space from the index to the end of the destination array.

This method is an O(n) operation, where n is count.

.NET Framework

Supported in: 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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 Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, 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.

Was this page helpful?
(1500 characters remaining)
Thank you for your feedback
© 2014 Microsoft