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CultureInfo.TwoLetterISOLanguageName Property

Gets the ISO 639-1 two-letter code for the language of the current CultureInfo.

Namespace:  System.Globalization
Assemblies:   mscorlib (in mscorlib.dll)
  System.Globalization (in System.Globalization.dll)

public virtual string TwoLetterISOLanguageName { get; }

Property Value

Type: System.String
The ISO 639-1 two-letter code for the language of the current CultureInfo.

For example, the two-letter abbreviation for English is "en". The TwoLetterISOLanguageName property value for the invariant culture is "iv".

NoteNote

When communicating between processes or persisting data it is usually better to use the full CultureInfo.Name. Using just the language can lose context and data.

If ISO 639-1 does not define a two-letter language code for a particular culture, the TwoLetterISOLanguageName property returns a string that consists of three or more letters. For more information, see the example.

The following example lists the cultures whose TwoLetterISOLanguageName property does not consist of a two-letter language code.

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      // Get all available cultures on the current system.
      CultureInfo[] cultures = CultureInfo.GetCultures(CultureTypes.AllCultures);

      Console.WriteLine("{0,-32} {1,-13} {2,-6}\n", "Display Name", 
                        "Name", "TwoLetterISOLanguageName");

      foreach (var culture in cultures) {
         // Exclude custom cultures. 
         if ((culture.CultureTypes & CultureTypes.UserCustomCulture) == CultureTypes.UserCustomCulture) 
            continue;

         // Exclude all two-letter codes. 
         if (culture.TwoLetterISOLanguageName.Length == 2)
            continue;

         Console.WriteLine("{0,-32} {1,-13} {2,-6}", culture.DisplayName,
                           culture.Name, culture.TwoLetterISOLanguageName);
      }   
   }
}
// The example output like the following: 
//       Display Name                     Name          TwoLetterISOLanguageName 
//        
//       Upper Sorbian                    hsb           hsb 
//       Konkani                          kok           kok 
//       Syriac                           syr           syr 
//       Tamazight                        tzm           tzm 
//       Filipino                         fil           fil 
//       Quechua                          quz           quz 
//       Sesotho sa Leboa                 nso           nso 
//       Mapudungun                       arn           arn 
//       Mohawk                           moh           moh 
//       Alsatian                         gsw           gsw 
//       Sakha                            sah           sah 
//       K'iche                           qut           qut 
//       Dari                             prs           prs 
//       Upper Sorbian (Germany)          hsb-DE        hsb 
//       Konkani (India)                  kok-IN        kok 
//       Syriac (Syria)                   syr-SY        syr 
//       Filipino (Philippines)           fil-PH        fil 
//       Quechua (Bolivia)                quz-BO        quz 
//       Sesotho sa Leboa (South Africa)  nso-ZA        nso 
//       Mapudungun (Chile)               arn-CL        arn 
//       Mohawk (Mohawk)                  moh-CA        moh 
//       Alsatian (France)                gsw-FR        gsw 
//       Sakha (Russia)                   sah-RU        sah 
//       K'iche (Guatemala)               qut-GT        qut 
//       Dari (Afghanistan)               prs-AF        prs 
//       Lower Sorbian (Germany)          dsb-DE        dsb 
//       Tamazight (Latin, Algeria)       tzm-Latn-DZ   tzm 
//       Quechua (Ecuador)                quz-EC        quz 
//       Quechua (Peru)                   quz-PE        quz 
//       Sami, Lule (Norway)              smj-NO        smj 
//       Sami, Lule (Sweden)              smj-SE        smj 
//       Sami, Southern (Norway)          sma-NO        sma 
//       Sami, Southern (Sweden)          sma-SE        sma 
//       Sami, Skolt (Finland)            sms-FI        sms 
//       Sami, Inari (Finland)            smn-FI        smn 
//       Sami (Inari)                     smn           smn 
//       Sami (Skolt)                     sms           sms 
//       Sami (Southern)                  sma           sma 
//       Lower Sorbian                    dsb           dsb 
//       Sami (Lule)                      smj           smj 
//       Tamazight (Latin)                tzm-Latn      tzm

.NET Framework

Supported in: 4.6, 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

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

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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