change system date format using c# code

Question

Hi kindly help me I want to change date format setting example => 21-01-2009 of Regional and Language Option using C#. Thans in advance

Lalit M · Answer

You can use this code change date format from regional language and setting. using System; using System.Globalization; using System.Threading; public class FormatDate { public static void Main() { DateTime dt = DateTime.Now; // Sets the CurrentCulture property to U.S. English. Thread.CurrentThread.CurrentCulture = new CultureInfo(en-US); // Displays dt formatted using the ShortDatePattern // and the CurrentThread.CurrentCulture. Console.WriteLine(dt.ToString(d)); // Creates a CultureInfo for German in Germany. CultureInfo ci = new CultureInfo(de-DE); // Displays dt formatted using the ShortDatePattern // and the CultureInfo. Console.WriteLine(dt.ToString(d ci)); } } Reference Link You can also use this code follow this steps To set regional settings on your computer: 1. In Control Panel double-click Regional and Language Options. 2. On the Regional Options tab select English (United States) from the list and then click Customize. 3. In the Customize Regional Options dialog box click the Date tab. 4. In the Short date format list under Short date select yyyy-MM-dd and then click OK. 5. In the Regional and Language Options dialog box click OK. 6. Start Microsoft Visual Studio .NET. 7. Create a new Windows Application project by using Visual Basic .NET or Visual C# .NET. By default Form1 is created. 8. Add a DateTimePicker control to Form1. 9. On Form1 right-click DateTimePicker1 and then click Properties. 10. In the Properties dialog box set the Format property to Short. 11. Add the following code to the DateTimePicker1_ValueChanged event handler: Visual Basic .NET Code 'The event is raised when the value is changed. System.Windows.Forms.MessageBox.Show(Value Changed) Visual C# .NET Code //The event is raised when the value is changed. System.Windows.Forms.MessageBox.Show(Value Changed); 12. On the Build menu click Build Solution. 13. On the Debug menu click Start. 14. Type any date in the DateTimePicker1 control. The event is raised only after you enter 4 digits for a year 2 digits for a month or 2 digits for a day. reference link

Lalit M · Answer

Also try this code 1. Open Registry 2.Write The Values 3. Close the Registry private void bntnChangeRegion_Click(object sender EventArgs e) { //Get Data From Text Boxes string DateFormat = txtDateFormat.Text.Trim(); string TimeFormat = txtTimeFormat.Text.Trim(); string Currency = txtCurrency.Text.Trim(); //Registry Logic //Open Sub key RegistryKey rkey = Registry.CurrentUser.OpenSubKey(@Control Panel\Internationaltrue); ///Set Values rkey.SetValue(sTimeFormatTimeFormat); rkey.SetValue(sShortDateDateFormat); rkey.SetValue(sCurrencyCurrency); //Close the Registry rkey.Close(); } reference link