Collection.CopyTo Method

Copies the entire Collection to a compatible one-dimensional Array, starting at the specified index of the target array.

Namespace: System.Collections.ObjectModel
Assembly: mscorlib (in mscorlib.dll)

virtual void CopyTo (
	array<T>^ array, 
	int index
) sealed
public final void CopyTo (
	T[] array, 
	int index
public final function CopyTo (
	array : T[], 
	index : int
Not applicable.



The one-dimensional Array that is the destination of the elements copied from Collection. The Array must have zero-based indexing.


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

Exception typeCondition


array is a null reference (Nothing in Visual Basic).


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


index is less than zero.


The number of elements in the source Collection is greater than the available space from index to the end of the destination array.

This method uses System.Array.Copy to copy the elements.

The elements are copied to the Array in the same order in which the enumerator iterates through the Collection.

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

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

.NET Compact Framework

Supported in: 2.0

XNA Framework

Supported in: 1.0