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String.Length Property

Gets the number of characters in the current String object.

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

public int Length { get; }

Property Value

Type: System.Int32
The number of characters in the current string.

The Length property returns the number of Char objects in this instance, not the number of Unicode characters. The reason is that a Unicode character might be represented by more than one Char. Use the System.Globalization.StringInfo class to work with each Unicode character instead of each Char.

In some languages, such as C and C++, a null character indicates the end of a string. In the .NET Framework, a null character can be embedded in a string. When a string includes one or more null characters, they are included in the length of the total string. For example, in the following string, the substrings "abc" and "def" are separated by a null character. The Length property returns 7, which indicates that it includes the six alphabetic characters as well as the null character.

StringBuilder charactersBuilder = new StringBuilder("abc");
string characters;

charactersBuilder.Append('\0');
charactersBuilder.Append("def");

characters = charactersBuilder.ToString();
Console.WriteLine(characters.Length);

The following example demonstrates the Length property.

// Sample for String.Length 
using System;

class Sample 
{
    public static void Main() 
    {
    string str = "abcdefg";
    Console.WriteLine("1) The length of '{0}' is {1}", str, str.Length);
    Console.WriteLine("2) The length of '{0}' is {1}", "xyz", "xyz".Length);
    }
}
/*
This example produces the following results:
1) The length of 'abcdefg' is 7
2) The length of 'xyz' is 3
*/

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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