ArrayList.CopyTo Method (Int32, Array, Int32, Int32)


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Copies a range of elements from the ArrayList to a compatible one-dimensional Array, starting at the specified index of the target array.

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

abstract CopyTo : 
        index:int *
        array:Array *
        arrayIndex:int *
        count:int -> unit
override CopyTo : 
        index:int *
        array:Array *
        arrayIndex:int *
        count:int -> unit


Type: System.Int32

The zero-based index in the source ArrayList at which copying begins.

Type: System.Array

The one-dimensional Array that is the destination of the elements copied from ArrayList. 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.

Exception Condition

array is null.


index is less than zero.


arrayIndex is less than zero.


count is less than zero.


array is multidimensional.


index is equal to or greater than the Count of the source ArrayList.


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


The type of the source ArrayList cannot be cast automatically to the type of the destination array.

The specified array must be of a compatible type.

This method uses Array.Copy to copy the elements.

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

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

The following code example shows how to copy an ArrayList into a one-dimensional System.Array.

No code example is currently available or this language may not be supported.

Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
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