How to Change the Time Format in the Regional Settings Using CSOM in SharePoint 2013 Online

Code Snippet:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Security;
using System.Text;
using System.Threading.Tasks;
using Microsoft.SharePoint.Client;
namespace CSOMOffice365
{
class Program
{
static void Main(string[] args)
{
string userName = "[email protected]";
Console.WriteLine("Enter your password.");
SecureString password = GetPassword();
// ClienContext - Get the context for the SharePoint Online Site
// SharePoint site URL - https://c986.sharepoint.com
using (var clientContext = new ClientContext("https://c986.sharepoint.com"))
{
// SharePoint Online Credentials
clientContext.Credentials = new SharePointOnlineCredentials(userName, password);
// Get the SharePoint web
Web web = clientContext.Web;
// Regional Settings: Change the time format
// Reference: https://msdn.microsoft.com/en-us/library/microsoft.sharepoint.client.regionalsettings.time24.aspx
RegionalSettings regSet = web.RegionalSettings;
regSet.Time24 = true;
// Update the regional settings
regSet.Update();
// Execute the query to the server
clientContext.ExecuteQuery();
}
}
private static SecureString GetPassword()
{
ConsoleKeyInfo info;
//Get the user's password as a SecureString
SecureString securePassword = new SecureString();
do
{
info = Console.ReadKey(true);
if (info.Key != ConsoleKey.Enter)
{
securePassword.AppendChar(info.KeyChar);
}
}
while (info.Key != ConsoleKey.Enter);
return securePassword;
}
}
}