This method copies count characters from the sourceIndex position of this instance to the destinationIndex position of destination character array. This method does not resize the destination character array; it must have a sufficient number of elements to accommodate the copied characters or the method throws an ArgumentOutOfRangeException.

sourceIndex and destinationIndex are zero-based.

The following example demonstrates copying characters from a string to a Unicode character array.

using System;
public class StringCopyToExample {
 public static void Main() {
 string str = "this is the new string";
 Char[] cAry = {'t','h','e',' ','o','l','d'};
 Console.WriteLine( "The initial string is '{0}'", str );
 Console.Write( "The initial character array is: '" );
 foreach( Char c in cAry)
 Console.Write( c );
 Console.WriteLine( "'" );
 str.CopyTo( 12, cAry, 4, 3 );
 Console.Write( "The character array after CopyTo is: '" );
 foreach( Char c in cAry)
 Console.Write( c );
 Console.WriteLine("'");
 }
}
   

The output is