How to Retrieve the REAL Hard Drive Serial Number

Hi,
I am bit of a novice.
So please tell what language is the script written?
Can it be used in server side to get the Sr number of client machines?

using System.Collections.Generic;
using System.Management;

namespace HardDriveSample1
{
    public class HardDrive
    {
        public string Model { get; private set; }

        public string Type { get; private set; }

        public string SerialNo { get; private set; }

        public static List<HardDrive> GetHardDrives()
        {
            var hdds = new List<HardDrive>();
            var searcher = new ManagementObjectSearcher("SELECT * FROM Win32_DiskDrive");
            foreach (var o in searcher.Get())
            {
                var wmiHd = (ManagementObject)o;
                var hd = new HardDrive
                {
                    Model = wmiHd["Model"].ToString(),
                    Type = wmiHd["InterfaceType"].ToString()
                };
                hdds.Add(hd);
            }
            searcher = new ManagementObjectSearcher("SELECT * FROM Win32_PhysicalMedia");
            var i = 0;
            foreach (var o in searcher.Get())
            {
                var wmiHd = (ManagementObject)o;
                var hd = hdds[i];
                hd.SerialNo = wmiHd["SerialNumber"]?.ToString() ?? "None";
				//incase of RAID drivers
                if (++i >= hdds.Count) break;
            }
            return hdds;
        } 
    }
}

HardDrive hd = (HardDrive)hdCollection[i];

An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in mscorlib.dll<br />
<br />
Additional information: Index was out of range. Must be non-negative and less than the size of the collection.

using System;
using System.Collections;
using System.Management;
using System.Text;

namespace DiskInfo
{

    class TestProgram
    {
        const int IdenentSize = 3;

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main(string[] args)
        {
            var sb = new StringBuilder();

            var diskDriveManagement = new ManagementClass("Win32_DiskDrive");
            var diskDriveInstanceObjectCollection = diskDriveManagement.GetInstances();

            foreach (ManagementObject diskDriveInstanceObject in diskDriveInstanceObjectCollection)
            {
                sb.AppendLine(DumpProperties(diskDriveInstanceObject, 0));
                foreach (ManagementObject diskPartitionObject in diskDriveInstanceObject.GetRelated("Win32_DiskPartition"))
                {
                    sb.AppendLine(DumpProperties(diskPartitionObject, 1));
                    foreach (ManagementBaseObject logicalDiskObject in diskPartitionObject.GetRelated("Win32_LogicalDisk"))
                    {
                        sb.AppendLine(DumpProperties(logicalDiskObject, 2));
                    }
                }
            }

            sb.AppendLine();
            Console.WriteLine(sb.ToString());
            Console.WriteLine("Press [Enter] to exit...");
            Console.ReadLine();
        }

        /// <summary>
        /// Dump properties of a ManagementBaseObject
        /// </summary>
        /// <param name="managementObject"></param>
        /// <param name="level"></param>
        /// <returns></returns>
        static String DumpProperties(ManagementBaseObject managementObject, int level)
        {
            var padd = "".PadLeft(level * IdenentSize);
            var sb = new StringBuilder();

            sb.AppendFormat(
@"
{0}========================================
{0}    {1}
{0}========================================
",
                                           padd, managementObject["Name"]);
            sb.AppendLine();

            var properties = managementObject.Properties;
            foreach (var prop in properties)
            {
                if (prop != null && prop.Value != null)
                {
                    if (prop.IsArray)
                    {
                        Array valuelist = prop.Value as Array;
                        sb.AppendFormat("{0}{1}:", padd, prop.Name);
                        sb.AppendLine();
                        foreach (var val in valuelist)
                        {
                            sb.AppendFormat("{0}   {1}", padd, val);
                            sb.AppendLine();
                        }
                    }
                    else
                    {
                        sb.AppendFormat("{0}{1}: {2}", padd, prop.Name, prop.Value);
                        sb.AppendLine();
                    }
                }
            }
            return sb.ToString();
        }
    }
}

the best way I found is, download a dll from http://www.soft.tahionic.com/download-hdd_id/hardware%20ID%20programmer%27s%20DLL.html

Add the dll to your project

add code, [DllImportAttribute("HardwareIDExtractorC.dll")] public static extern String GetIDESerialNumber(byte DriveNumber);

call the hard disk ID from where you need it, GetIDESerialNumber(0).Replace(" ", string.Empty);

Note: go to properties of the dll in explorer and set "Build action" to "Embedded Resource"

Simple as that... Enjoy.... :)