Generate unique device ID or fingerprint for licensing etc. on Windows based system.

Fingerprint.cs

using System;
using System.Linq;
using System.Management;
using System.Security.Cryptography;
using System.Text;

namespace DeviceID
{
    internal class Fingerprint
    {
        public static string Generate()
        {
            var str = GetBoardSerialNumber() + "_" + GetCpuID() + "_" + GetHardDiskID();

            return CreateMD5(str);
        }

        private static string GetBoardSerialNumber() =>
            GetManagementObjectValue("SELECT SerialNumber FROM Win32_BaseBoard", "SerialNumber");

        public static string GetCpuID() =>
            GetManagementObjectValue("SELECT ProcessorID FROM Win32_Processor", "ProcessorID");

        private static string GetHardDiskID() =>
            GetManagementObjectValue("SELECT SerialNumber FROM Win32_DiskDrive WHERE InterfaceType = 'SCSI'", "SerialNumber");

        private static string GetManagementObjectValue(string query, string property)
        {
            try
            {
                var mos = new ManagementObjectSearcher(query);
                var moc = mos.Get();

                foreach (ManagementObject mo in moc.Cast<ManagementObject>())
                {
                    return mo[property].ToString();
                }
            }
            catch
            {
                // ignore
            }

            return string.Empty;
        }

        private static string CreateMD5(string input)
        {
            using var md5 = MD5.Create();
            var bytes = Encoding.ASCII.GetBytes(input);
            var hash = md5.ComputeHash(bytes);

            return Convert.ToHexString(hash);
        }
    }
}