ICollection.CopyTo Method

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Copies the elements of the ICollection to an Array, starting at a particular Array index.

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


Sub CopyTo ( _
    array As Array, _
    index As Integer _
void CopyTo(
    Array array,
    int index


  • index
    Type: System.Int32
    The zero-based index in array at which copying begins.


Exception Condition

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


index is less than zero.


array is multidimensional.


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


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


Platform Notes

Silverlight for Windows Phone Silverlight for Windows Phone

 CopyTo throws ArgumentException instead of InvalidCastException.

Version Information


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0


For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.