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String.CopyTo Method

Copies a specified number of characters from a specified position in this instance to a specified position in an array of Unicode characters.

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

[SecuritySafeCriticalAttribute]
public void CopyTo(
	int sourceIndex,
	char[] destination,
	int destinationIndex,
	int count
)

Parameters

sourceIndex
Type: System.Int32
The index of the first character in this instance to copy.
destination
Type: System.Char[]
An array of Unicode characters to which characters in this instance are copied.
destinationIndex
Type: System.Int32
An index in destination at which the copy operation begins.
count
Type: System.Int32
The number of characters in this instance to copy to destination.

ExceptionCondition
ArgumentNullException

destination is null.

ArgumentOutOfRangeException

sourceIndex, destinationIndex, or count is negative

-or-

count is greater than the length of the substring from startIndex to the end of this instance

-or-

count is greater than the length of the subarray from destinationIndex to the end of destination

count characters are copied from the sourceIndex position of this instance to the destinationIndex position of destination.

sourceIndex and destinationIndex are zero-based.

The following code example demonstrates the CopyTo method.


using System;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {

      // Embed an array of characters in a string
      string strSource = "changed";
      char[] destination = { 'T', 'h', 'e', ' ', 'i', 'n', 'i', 't', 'i', 'a', 'l', ' ',
                'a', 'r', 'r', 'a', 'y' };

      // Print the char array
      outputBlock.Text += destination + "\n";

      // Embed the source string in the destination string
      strSource.CopyTo(0, destination, 4, strSource.Length);

      // Print the resulting array
      outputBlock.Text += destination + "\n";

      strSource = "A different string";

      // Embed only a section of the source string in the destination
      strSource.CopyTo(2, destination, 3, 9);

      // Print the resulting array
      outputBlock.Text += destination + "\n";
   }
}
// The example displays the following output:
//       The initial array
//       The changed array
//       Thedifferentarray


Silverlight

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.

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