String.Length Property

Gets the number of characters in the current string.

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;


characters = charactersBuilder.ToString();
outputBlock.Text += characters.Length + "\n";

The following code example demonstrates the Length property.

// Sample for String.Length
using System;

class Example
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
      string str = "abcdefg";
      outputBlock.Text += String.Format("1) The length of '{0}' is {1}", str, str.Length) + "\n";
      outputBlock.Text += String.Format("2) The length of '{0}' is {1}", "xyz", "xyz".Length) + "\n";
This example produces the following results:
1) The length of 'abcdefg' is 7
2) The length of 'xyz' is 3


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.