Get And Set The System Date And Time using c#

Have you want to get your current system date and time as well as set the system date and time using c# code.
here it is, C# code snippet that uses unmanaged code to retrieve the current date and time of the Windows operating system, and also sets it to the specified values.

1. using System;
2. using System.Collections.Generic;
3. using System.ComponentModel;
4. using System.Data;
5. using System.Windows.Forms;
6. using System.Runtime.InteropServices;
8. namespace Sample
9. {
10. public partial class Form1 : Form
11. {
12. public Form1()
13. {
14. InitializeComponent();
15. }
17. public struct SystemTime
18. {
19. public ushort Year;
20. public ushort Month;
21. public ushort DayOfWeek;
22. public ushort Day;
23. public ushort Hour;
24. public ushort Minute;
25. public ushort Second;
26. public ushort Millisecond;
27. };
29. [DllImport("kernel32.dll", EntryPoint = "GetSystemTime", SetLastError = true)]
30. public extern static void Win32GetSystemTime(ref SystemTime sysTime);
32. [DllImport("kernel32.dll", EntryPoint = "SetSystemTime", SetLastError = true)]
33. public extern static bool Win32SetSystemTime(ref SystemTime sysTime);
35. private void button1_Click(object sender, EventArgs e)
36. {
37. // Set system date and time
38. SystemTime updatedTime = new SystemTime();
39. updatedTime.Year = (ushort)2008;
40. updatedTime.Month = (ushort)4;
41. updatedTime.Day = (ushort)23;
42. // UTC time; it will be modified according to the regional settings of the target computer so the actual hour might differ
43. updatedTime.Hour = (ushort)10;
44. updatedTime.Minute = (ushort)0;
45. updatedTime.Second = (ushort)0;
46. // Call the unmanaged function that sets the new date and time instantly
47. Win32SetSystemTime(ref updatedTime);
49. // Retrieve the current system date and time
50. SystemTime currTime = new SystemTime();
51. Win32GetSystemTime(ref currTime);
52. // You can now use the struct to retrieve the date and time
53. MessageBox.Show("It's " + currTime.Hour + " o'clock. Do you know where your C# code is?");
54. }
55. }
56. }

Happy Coding..!!