Thread.CurrentUICulture Property


The .NET API Reference documentation has a new home. Visit the .NET API Browser on to see the new experience.

Gets or sets the current culture used by the Resource Manager to look up culture-specific resources at run time.

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

public CultureInfo CurrentUICulture {
	[HostProtectionAttribute(SecurityAction.LinkDemand, ExternalThreading = true)]

Property Value

Type: System.Globalization.CultureInfo

An object that represents the current culture.

Exception Condition

The property is set to null.


The property is set to a culture name that cannot be used to locate a resource file. Resource filenames must include only letters, numbers, hyphens or underscores.

The UI culture specifies the resources an application needs to support user input and output, and by default is the same as the operating system culture. See the CultureInfo class to learn about culture names and identifiers, the differences between invariant, neutral, and specific cultures, and the way culture information affects threads and application domains. See the CultureInfo.CurrentUICulture property to learn how a thread's default UI culture is determined.

The CultureInfo returned by this property can be a neutral culture. Neutral cultures should not be used with formatting methods such as String.Format(IFormatProvider, String, Object[]), DateTime.ToString(String, IFormatProvider), and Convert.ToString(Char, IFormatProvider). Use the CultureInfo.CreateSpecificCulture method to get a specific culture, or use the CurrentCulture property.


The CultureInfo.CreateSpecificCulture method throws ArgumentException for the neutral cultures "zh-Hant" ("zh-CHT") and "zh-Hans" ("zh-CHS").

The following example determines whether the language of the current thread's UI culture is French. If it is not, it sets the UI culture of the current thread to English (United States).

using System;
using System.Globalization;
using System.Threading;

public class Example
   public static void Main()
      // Change the current culture if the language is not French.
      CultureInfo current = Thread.CurrentThread.CurrentUICulture;
      if (current.TwoLetterISOLanguageName != "fr") {
         CultureInfo newCulture = CultureInfo.CreateSpecificCulture("en-US");
         Thread.CurrentThread.CurrentUICulture = newCulture;
         // Make current UI culture consistent with current culture.
         Thread.CurrentThread.CurrentCulture = newCulture;
      Console.WriteLine("The current UI culture is {0} [{1}]",
      Console.WriteLine("The current culture is {0} [{1}]",
// The example displays the following output:
//     The current UI culture is English (United States) [en-US]
//     The current culture is English (United States) [en-US]

The following code example shows the threading statement that allows the user interface of a Windows Forms to display in the culture that is set in Control Panel. Additional code is needed.

using System;
using System.Threading;
using System.Windows.Forms;

class UICulture : Form
    public UICulture()
        // Set the user interface to display in the
        // same culture as that set in Control Panel.
        Thread.CurrentThread.CurrentUICulture = 

        // Add additional code.

    static void Main()
        Application.Run(new UICulture());

.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Return to top