To get the serial number of the hard disk, we need to use some C# classes.

ManagementObjectSearcher Class is the class which initializes the new instance of ManagementObjectSearcher class. Basically, it is used to retrieve the management system of the system.
Let's Start.
Step 1: Creat a Project =>Right click on references, then Add System.Management, System.Management.Instrument.

Add a button and three labels to it.

Step 2 : Add the Namespaces to the project.

C# Code
  1. using System.Management;
  2. using System.IO;
  3. using System.Collections;
Step 3: Declare an ArrayList.
  1. ArrayList hardDriveDetails = new ArrayList();
Step 4: In the buttonClick event, write the following code.
  1. private void button1_Click(object sender, EventArgs e)
  2. {
  3. ManagementObjectSearcher moSearcher = new
  4. ManagementObjectSearcher("SELECT * FROM Win32_DiskDrive");
  6. foreach (ManagementObject wmi_HD in moSearcher.Get())
  7. {
  8. HardDrive hd = new HardDrive(); // User Defined Class
  9. hd.Model = wmi_HD["Model"].ToString(); //Model Number
  10. hd.Type = wmi_HD["InterfaceType"].ToString(); //Interface Type
  11. hd.SerialNo= wmi_HD["SerialNumber"].ToString(); Serial Number
  12. hardDriveDetails.Add(hd);
  13. label1.Text ="Model : "+ hd.Model ;
  14. label2.Text = " Type : " + hd.Type;
  15. label3.Text = " Serial Number : " + hd.SerialNo;
  16. }
  18. }
Step 5: Add a user-defined class HardDrive having the following properties.
  1. class HardDrive
  2. {
  3. private string model = null;
  4. private string type = null;
  5. private string serialNo = null;
  6. public string Model
  7. {
  8. get { return model; }
  9. set { model = value; }
  10. }
  11. public string Type
  12. {
  13. get { return type; }
  14. set { type = value; }
  15. }
  16. public string SerialNo
  17. {
  18. get { return serialNo; }
  19. set { serialNo = value; }
  20. }
  21. }
Step 6: Now, run the code.