Code Snippet:
  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Net;
  5. using System.Security;
  6. using System.Text;
  7. using System.Threading.Tasks;
  8. using Microsoft.SharePoint.Client;
  10. namespace CSOMOffice365
  11. {
  12. class Program
  13. {
  14. static void Main(string[] args)
  15. {
  17. string userName = "[email protected]";
  19. Console.WriteLine("Enter your password.");
  20. SecureString password = GetPassword();
  22. // ClienContext - Get the context for the SharePoint Online Site
  23. // SharePoint site URL - https://c986.sharepoint.com
  25. using (var clientContext = new ClientContext("https://c986.sharepoint.com"))
  26. {
  27. // SharePoint Online Credentials
  28. clientContext.Credentials = new SharePointOnlineCredentials(userName, password);
  30. // Get the SharePoint web
  31. Web web = clientContext.Web;
  33. // Regional Settings: Change the time format
  34. // Reference: https://msdn.microsoft.com/en-us/library/microsoft.sharepoint.client.regionalsettings.time24.aspx
  35. RegionalSettings regSet = web.RegionalSettings;
  36. regSet.Time24 = true;
  38. // Update the regional settings
  39. regSet.Update();
  41. // Execute the query to the server
  42. clientContext.ExecuteQuery();
  43. }
  44. }
  46. private static SecureString GetPassword()
  47. {
  48. ConsoleKeyInfo info;
  50. //Get the user's password as a SecureString
  51. SecureString securePassword = new SecureString();
  52. do
  53. {
  54. info = Console.ReadKey(true);
  55. if (info.Key != ConsoleKey.Enter)
  56. {
  57. securePassword.AppendChar(info.KeyChar);
  58. }
  59. }
  60. while (info.Key != ConsoleKey.Enter);
  61. return securePassword;
  62. }
  63. }
  64. }
Result: