HDD serial

using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Management;
static class Module1
{
    public static void Main()
    {
        ManagementObjectSearcher hd =
            new ManagementObjectSearcher("SELECT * FROM in32_PhysicalMedia");
        foreach (ManagementObject dvs in hd.Get()) {
            string serial = dvs["SerialNumber"].ToString();
            Console.WriteLine(serial);
        }
        Console.ReadKey();
    }
}