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String.ToCharArray Method (Int32, Int32)


Copies the characters in a specified substring in this instance to a Unicode character array.

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

public char[] ToCharArray(
	int startIndex,
	int length


Type: System.Int32

The starting position of a substring in this instance.

Type: System.Int32

The length of the substring in this instance.

Return Value

Type: System.Char[]

A Unicode character array whose elements are the length number of characters in this instance starting from character position startIndex.

Exception Condition

startIndex or length is less than zero.


startIndex plus length is greater than the length of this instance.

This method copies the characters in a portion of a string to a character array. To create a string from a range of characters in a character array, call the String(Char[], Int32, Int32) constructor.

The startIndex parameter is zero-based. That is, the index of the first character in the string instance is zero.

If length is zero, the returned array is empty and has a zero length. If this instance is null or an empty string (""), the returned array is empty and has a zero length.

The following example converts a substring within a string to an array of characters, then enumerates and displays the elements of the array.

// Sample for String.ToCharArray(Int32, Int32)
using System;

class Sample {
    public static void Main() {
    string str = "012wxyz789";
    char[] arr;

    arr = str.ToCharArray(3, 4);
    Console.Write("The letters in '{0}' are: '", str);
    Console.WriteLine("Each letter in '{0}' is:", str);
    foreach (char c in arr)
This example produces the following results:
The letters in '012wxyz789' are: 'wxyz'
Each letter in '012wxyz789' is:

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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