Unregister Method
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CultureAndRegionInfoBuilder.Unregister Method

Deletes a custom culture from the local computer.

Namespace:  System.Globalization
Assembly:  sysglobl (in sysglobl.dll)

public static void Unregister(
	string cultureName


Type: System.String
The name of a custom culture.


cultureName is a parent culture or console fallback user interface culture of a dependent culture.


Application does not have administrative privileges.


cultureName specifies a culture that is not found.

The Unregister method does the reverse of the Register method. The Register method stores a custom culture as a file on the local computer in the Globalization subdirectory of the directory returned by the Win32 API GetWindowsDirectory function. The Unregister method deletes the persisted custom culture file from the computer. After the file is deleted, existing instances of the custom culture in computer memory continue to work, but new instances of the custom culture cannot be created.

Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition Platform Note: A custom culture cannot be unregistered if it is in use.

The following code example demonstrates the Unregister method.

// This example demonstrates the System.Globalization.Culture-
// AndRegionInfoBuilder Unregister method.
// Compile this example with a reference to sysglobl.dll.

   This example deletes the custom culture x-en-US-sample.nlp 
   file, but not the %winnt%\Globalization directory that contains the file.

using System;
using System.Globalization;

class Sample 
    public static void Main() 
        Console.WriteLine("Unregister the \"x-en-US-sample\" " +
                          "custom culture if it already exists...");
        Console.WriteLine("The custom culture was unregistered successfully.");
    catch (Exception e)
        Console.WriteLine("Error while unregistering...");
This code example produces the following results:

Unregister the "x-en-US-sample" custom culture if it already exists...
The custom culture was unregistered successfully.


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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.
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