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SortedList.CopyTo Method

Copies SortedList elements to a one-dimensional Array object, starting at the specified index in the array.

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

public virtual void CopyTo(
	Array array,
	int arrayIndex


Type: System.Array

The one-dimensional Array object that is the destination of the DictionaryEntry objects copied from SortedList. 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 null.


arrayIndex is less than zero.


array is multidimensional.


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


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

The key/value pairs are copied to the Array object in the same order in which the enumerator iterates through the SortedList object.

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

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

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

The following code example shows how to copy the values in a SortedList object into a one-dimensional Array object.

using System;
 using System.Collections;
 public class SamplesSortedList  {

    public static void Main()  {

       // Creates and initializes the source SortedList.
       SortedList mySourceList = new SortedList();
       mySourceList.Add( 2, "cats" );
       mySourceList.Add( 3, "in" );
       mySourceList.Add( 1, "napping" );
       mySourceList.Add( 4, "the" );
       mySourceList.Add( 0, "three" );
       mySourceList.Add( 5, "barn" );

       // Creates and initializes the one-dimensional target Array.
       String[] tempArray = new String[] { "The", "quick", "brown", "fox", "jumped", "over", "the", "lazy", "dog" };
       DictionaryEntry[] myTargetArray = new DictionaryEntry[15];
       int i = 0;
       foreach ( String s in tempArray )  {
          myTargetArray[i].Key = i;
          myTargetArray[i].Value = s;

       // Displays the values of the target Array.
       Console.WriteLine( "The target Array contains the following (before and after copying):" );
       PrintValues( myTargetArray, ' ' );

       // Copies the entire source SortedList to the target SortedList, starting at index 6.
       mySourceList.CopyTo( myTargetArray, 6 );

       // Displays the values of the target Array.
       PrintValues( myTargetArray, ' ' );

    public static void PrintValues( DictionaryEntry[] myArr, char mySeparator )  {
       for ( int i = 0; i < myArr.Length; i++ )
          Console.Write( "{0}{1}", mySeparator, myArr[i].Value );


This code produces the following output.

The target Array contains the following (before and after copying):
 The quick brown fox jumped over the lazy dog      
 The quick brown fox jumped over three napping cats in the barn


Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0