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NeutralResourcesLanguageAttribute Class

Informs the ResourceManager of the default culture of an application. This class cannot be inherited.

System.Object
  System.Attribute
    System.Resources.NeutralResourcesLanguageAttribute

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

[AttributeUsageAttribute(AttributeTargets.Assembly, AllowMultiple = false)]
[ComVisibleAttribute(true)]
public sealed class NeutralResourcesLanguageAttribute : Attribute

The NeutralResourcesLanguageAttribute type exposes the following members.

  NameDescription
Public methodSupported by the XNA FrameworkSupported by Portable Class LibraryNeutralResourcesLanguageAttribute(String)Initializes a new instance of the NeutralResourcesLanguageAttribute class.
Public methodNeutralResourcesLanguageAttribute(String, UltimateResourceFallbackLocation)Initializes a new instance of the NeutralResourcesLanguageAttribute class with the specified ultimate resource fallback location.
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  NameDescription
Public propertySupported by the XNA FrameworkSupported by Portable Class LibraryCultureNameGets the culture name.
Public propertyLocationGets the location for the ResourceManager class to use to retrieve neutral resources by using the resource fallback process.
Public propertyTypeIdWhen implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
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  NameDescription
Public methodSupported by the XNA FrameworkSupported by Portable Class LibraryEqualsInfrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.)
Protected methodSupported by the XNA FrameworkSupported by Portable Class LibraryFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by the XNA FrameworkSupported by Portable Class LibraryGetHashCodeReturns the hash code for this instance. (Inherited from Attribute.)
Public methodSupported by the XNA FrameworkSupported by Portable Class LibraryGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIsDefaultAttributeWhen overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public methodSupported by the XNA FrameworkMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Protected methodSupported by the XNA FrameworkSupported by Portable Class LibraryMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by the XNA FrameworkSupported by Portable Class LibraryToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Explicit interface implemetationPrivate method_Attribute.GetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.InvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)
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The NeutralResourcesLanguageAttribute attribute informs the ResourceManager of the application's default culture, and also informs the ResourceManager that the default culture's resources are found in the main application assembly. When looking up resources in the same culture as the default culture, the ResourceManager automatically uses the resources located in the main assembly instead of searching for a satellite assembly. This improves lookup performance for the first resource you load, and can reduce your working set.

NoteNote

Apply this attribute to your main assembly, passing it the name of the default culture whose resources are embedded in the main assembly. Optionally, you can pass a member of the UltimateResourceFallbackLocation enumeration to indicate the location from which to retrieve fallback resources. Using this attribute is strongly recommended.

The following example uses a simple "Hello World" application to illustrate the use of NeutralResourcesLanguageAttribute to define a default or fallback culture. It requires the creation of separate resource files for the English (en), English (United States) (en-US), and French (France) (fr-FR) cultures. The following shows the contents of a text file named ExampleResources.txt for the English culture.

# Resources for the default (en) culture.
Greeting=Hello

In order to use the resource file in an application, you must use Resource File Generator (Resgen.exe) to convert it from its text (.txt) format to a binary (.resources) format. The following command performs the conversion.

resgen ExampleResources.txt

When the application is compiled, the binary resource file will be embedded in the main application assembly.

The following shows the contents of a text file named ExampleResources.en-US.txt that provides resources for the English (United States) culture.

# Resources for the en-US culture.
Greeting=Hi

The text file can be converted to a binary resources file by using the Resource File Generator (ResGen.exe) at the command line as follows:

resgen ExampleResources.en-US.txt ExampleResources.en-US.resources

The binary resource file should then be compiled into an assembly by using Assembly Linker (Al.exe) and placed in the en-US subdirectory of the application directory by issuing the following command:

al /t:lib /embed:ExampleResources.en-US.resources /culture:en-US /out:en-us\Example.resources.dll

The following shows the contents of a text file named ExampleResources.fr-FR.txt that provides resources for the French (France) culture.

# Resources for the fr-FR culture.
Greeting=Bonjour

The text file can be converted to a binary resource file by using ResGen.exe at the command line as follows:

resgen ExampleResources.fr-FR.txt ExampleResources.fr-FR.resources

The binary resources file should then be compiled into an assembly by using Assembly Linker and placed in the fr-FR subdirectory of the application directory by issuing the following command:

al /t:lib /embed:ExampleResources.fr-FR.resources /culture:fr-FR /out:fr-FR\Example.resources.dll

The following example provides the executable code that sets the current culture, prompts for the user's name, and displays a localized string.


using System;
using System.Globalization;
using System.Reflection;
using System.Resources;
using System.Threading;

[assembly:NeutralResourcesLanguageAttribute("en")]
public class Example
{
   public static void Main()
   {
      // Select the current culture randomly to test resource fallback.
      string[] cultures = { "de-DE", "en-us", "fr-FR" };
      Random rnd = new Random();
      int index = rnd.Next(0, cultures.Length);
      Thread.CurrentThread.CurrentUICulture = CultureInfo.CreateSpecificCulture(cultures[index]);      
      Console.WriteLine("The current culture is {0}", 
                        CultureInfo.CurrentUICulture.Name);       

      // Retrieve the resource.
      ResourceManager rm = new ResourceManager("ExampleResources" , 
                                               typeof(Example).Assembly);
      string greeting = rm.GetString("Greeting");

      Console.Write("Enter your name: ");
      string name = Console.ReadLine();
      Console.WriteLine("{0} {1}!", greeting, name);
   }
}


It can be compiled by using the following command in Visual Basic:

vbc Example.vb /resource:ExampleResources.resources

or by using the following command in C#:

csc Example.cs /resource:ExampleResources.resources

.NET Framework

Supported in: 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

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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