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CopyTo Method

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 void CopyTo(
	string[] array,
	int index
)

Parameters

array
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.

index
Type: System.Int32

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

ExceptionCondition
ArgumentNullException

array is null.

ArgumentOutOfRangeException

index is less than zero.

ArgumentException

array is multidimensional.

-or-

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

InvalidCastException

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.

using System;
using System.Collections;
using System.Collections.Specialized;

public class SamplesStringCollection  {

   public static void Main()  {

      // Creates and initializes a new StringCollection.
      StringCollection myCol = new StringCollection();
      String[] myArr = new String[] { "RED", "orange", "yellow", "RED", "green", "blue", "RED", "indigo", "violet", "RED" };
      myCol.AddRange( myArr );

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

      // Copies the collection to a new array starting at index 0.
      String[] myArr2 = new String[myCol.Count];
      myCol.CopyTo( myArr2, 0 );

      Console.WriteLine( "The new array contains:" );
      for ( int i = 0; i < myArr2.Length; i++ )  {
         Console.WriteLine( "   [{0}] {1}", i, myArr2[i] );
      }
      Console.WriteLine();

   }

   public static void PrintValues( IEnumerable myCol )  {
      foreach ( Object obj in myCol )
         Console.WriteLine( "   {0}", obj );
      Console.WriteLine();
   }

}

/*
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: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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