In C#, how to get the "Country or region" selected under "Region & language" in Windows 10?

user_8557153 0
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I am running Windows 10. When I open "Region & language settings" from the start menu, I can select a "Country or region". I am trying to get this value in a C# program.

I am in Denmark. I have tried changing my country to Germany (see screenshot), but I cannot get my code to return Germany. Rebooting the computer did not help.

I have written some code inspired by this thread.

My code looks like this (trying various things at once, getting all the region/culture things I can think of):

private static void Main(string[] args)
{
    Thread.CurrentThread.CurrentCulture.ClearCachedData();
    Thread.CurrentThread.CurrentUICulture.ClearCachedData();
    var thread = new Thread(() => ((Action) (() =>
    {
        Console.WriteLine("Current culture: {0}", Thread.CurrentThread.CurrentCulture.Name);
        Console.WriteLine("Current UI culture: {0}", Thread.CurrentThread.CurrentUICulture.Name);
        Console.WriteLine("Installed UI culture: {0}", CultureInfo.InstalledUICulture.Name);
        Console.WriteLine("Current region: {0}", RegionInfo.CurrentRegion.ThreeLetterISORegionName);
        Console.WriteLine("System default LCID: {0}", GetSystemDefaultLCID());
    }))());
    thread.Start();
    thread.Join();
    Console.ReadKey();
}

[DllImport("kernel32.dll")]
private static extern uint GetSystemDefaultLCID();

It outputs:

Current culture: en-DK
Current UI culture: en-US
Installed UI culture: en-US
Current region: DNK
System default LCID: 1033

How can I get my program to detect that I have selected Germany? What method or property do I need to call? And what restarts or cache-clearing might be necessary?

country culture region locale c#
4 Answers

Much shorter than the chosen answer and without a need for DllImports or ClearCachedData:

var regKeyGeoId = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(@"Control Panel\International\Geo");
var geoID = (string)regKeyGeoId.GetValue("Nation");
var allRegions = CultureInfo.GetCultures(CultureTypes.SpecificCultures).Select(x => new RegionInfo(x.ToString()));
var regionInfo = allRegions.FirstOrDefault(r => r.GeoId == Int32.Parse(geoID));
Console.WriteLine("EnglishName:" + regionInfo.EnglishName);
Console.WriteLine("DisplayName:" + regionInfo.DisplayName);
Console.WriteLine("NativeName:" + regionInfo.NativeName);
Console.WriteLine("ISOCurrencySymbol:" + regionInfo.ISOCurrencySymbol);
Console.WriteLine("Name:" + regionInfo.Name);

This reads the information you have set in Windows 10 under "Regional & Language" > "Country or region".

Credit should go to @Zan as mine is just an extension of his post: Get Current Location (as specified in Region and Language) in C#

user_12667320
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