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StringCollection.CopyTo Method

Copies the entire StringCollection values to a one-dimensional array of strings, starting at the specified index of the target array.

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

Public Sub CopyTo ( _
	array As String(), _
	index As Integer _


Type: System.String()

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

Type: System.Int32

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


array is Nothing.


index is less than zero.


array is multidimensional.


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


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

The specified array must be of a compatible type.

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

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

The following code example copies a StringCollection to an array.

Imports System
Imports System.Collections
Imports System.Collections.Specialized

Public Class SamplesStringCollection   

   Public Shared Sub Main()

      ' Creates and initializes a new StringCollection. 
      Dim myCol As New StringCollection()
      Dim myArr() As [String] = {"RED", "orange", "yellow", "RED", "green", "blue", "RED", "indigo", "violet", "RED"}

      Console.WriteLine("Initial contents of the StringCollection:")

      ' Copies the collection to a new array starting at index 0. 
      Dim myArr2(myCol.Count) As [String]
      myCol.CopyTo(myArr2, 0)

      Console.WriteLine("The new array contains:")
      Dim i As Integer 
      For i = 0 To myArr2.Length - 1
         Console.WriteLine("   [{0}] {1}", i, myArr2(i))
      Next i

   End Sub 'Main

   Public Shared Sub PrintValues(myCol As IEnumerable)
      Dim obj As [Object]
      For Each obj In  myCol
         Console.WriteLine("   {0}", obj)
      Next obj
   End Sub 'PrintValues

End Class 'SamplesStringCollection 

'This code produces the following output. 

'Initial contents of the StringCollection: 
'   RED 
'   orange 
'   yellow 
'   RED 
'   green 
'   blue 
'   RED 
'   indigo 
'   violet 
'   RED 

'The new array contains: 
'   [0] RED 
'   [1] orange 
'   [2] yellow 
'   [3] RED 
'   [4] green 
'   [5] blue 
'   [6] RED 
'   [7] indigo 
'   [8] violet 
'   [9] RED 

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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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