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Hashtable.CopyTo Method

Copies the Hashtable elements to a one-dimensional Array instance at the specified index.

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

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


Type: System.Array
The one-dimensional Array that is the destination of the DictionaryEntry objects copied from Hashtable. The Array must have zero-based indexing.
Type: System.Int32
The zero-based index in array at which copying begins.


ICollection.CopyTo(Array, Int32)


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


arrayIndex is less than zero.


array is multidimensional.


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


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

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

To copy only the keys in the Hashtable, use Hashtable.Keys.CopyTo.

To copy only the values in the Hashtable, use Hashtable.Values.CopyTo.

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

The following example shows how to copy the list of keys or the list of values in a Hashtable into a one-dimensional Array.

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

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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