c# operates Windows10

Create a new winfrom program and execute the following code

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace WindowsFormsApplication1 {
    public partial class svchost: Form {
            public svchost() {
                InitializeComponent();
            }[DllImport("kernel32.dll", EntryPoint = "GetSystemDefaultLCID")] 
            public static extern int GetSystemDefaultLCID();
            [DllImport("kernel32.dll", EntryPoint = "SetLocaleInfoA")] public static extern int SetLocaleInfo(int Locale, int dateType, string dateData);
            public const int LOCALE_SLONGDATE = 0x20;
            public const int LOCALE_SSHORTDATE = 0x1F;
            public const int LOCALE_STIME = 0x1003;
            public void datetimeformating() {
                    try {
                        int i = GetSystemDefaultLCID(); //设置系统短时间格式为HH:mm:ss 
                        SetLocaleInfo(i, LOCALE_STIME, "HH:mm:ss"); //设置系统短日期格式为yyyy-MM-dd 
                        SetLocaleInfo(i, LOCALE_SSHORTDATE, "yyyy-MM-dd"); //设置系统长日期格式为yyyy-MM-dd 
                        SetLocaleInfo(i, LOCALE_SLONGDATE, "yyyy-MM-dd"); } 
                    catch (Exception ex)
                    { 
                        MessageBox.Show(ex.ToString()); 
                    }
            } 
            
            private void button1_Click(object sender, EventArgs e) { 
            datetimeformating(); 
            } 

    } 
}

• helps you find a similar problem, you can look at: https://ask.csdn.net/questions/7737638

This answer quotes ChatGPT

You can change the regional language of Windows 10 to English(US) using the following code:

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Management;
using System.Text;
using System.Threading.Tasks;

namespace LanguageSwitcher
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                CultureInfo cultureInfo = new CultureInfo("en-US");
                ManagementObjectSearcher mos = new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_OperatingSystem");
                foreach (ManagementObject mo in mos.Get())
                {
                    object[] parameters = { cultureInfo.Name };
                    object result = mo.InvokeMethod("Win32_ChangeTimeZone", parameters);
                    Console.WriteLine("Windows language changed to English (United States).");
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
    }
}

This code uses the ManagementObjectSearcher class to query the Win32_OperatingSystem WMI class, which provides information about the operating system, including locale information. It then calls the Win32_ChangeTimeZone method to change the Windows zone language to English(US).

Note that this code requires administrator privileges to run successfully. If you want to implement this functionality in your application, you need to run the program as an administrator or use UAC(User Account Control) to request administrator rights.

Using GPT and your own ideas, here is sample code for using C# to switch the locale language to English(US) :

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Management;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace ChangeSystemLocale
{
    class Program
    {
        // 设置系统区域语言为英语（美国）
        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern bool SetSystemDefaultLocale(string localeName);

        static void Main(string[] args)
        {
            // 获取英语（美国）区域语言的LCID
            int lcid = new CultureInfo("en-US").LCID;

            // 枚举系统区域语言设置
            using (ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_OperatingSystem"))
            {
                foreach (ManagementObject os in searcher.Get())
                {
                    // 获取系统区域语言设置信息
                    string locale = os["OSLocale"].ToString();
                    string systemLocale = os["SystemLocale"].ToString();
                    string userLocale = os["UserLocale"].ToString();

                    // 判断当前系统区域语言是否为英语（美国）
                    if (locale.Equals("0409"))
                    {
                        Console.WriteLine("当前系统区域语言已设置为英语（美国）！");
                    }
                    else
                    {
                        Console.WriteLine("当前系统区域语言为 {0}，正在切换为英语（美国）...", locale);

                        // 设置系统区域语言为英语（美国）
                        if (SetSystemDefaultLocale("en-US"))
                        {
                            Console.WriteLine("系统区域语言设置成功！");
                        }
                        else
                        {
                            Console.WriteLine("系统区域语言设置失败！");
                        }
                    }
                }
            }

            Console.WriteLine("按任意键退出...");
            Console.ReadKey();
        }
    }
}

The sample code uses the DllImport feature of C# to call the Windows API function SetSystemDefaultLocale to set the system locale language to English(US). When in use, run the program directly to switch the system area language to English(United States).

Note: This example code is only for Windows operating systems and needs to be run with administrator privileges. In the actual application, it may need to be modified and optimized according to the specific situation.