Get HWID (hashed)

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

public static string GetHwid()
{
   string hwid = "";

   // Get the motherboard serial number
   ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT SerialNumber FROM Win32_BaseBoard");
   foreach (ManagementObject obj in searcher.Get())
   {
       hwid += obj["SerialNumber"].ToString();
       break;
   }

   // Get the primary hard drive serial number
   searcher = new ManagementObjectSearcher("SELECT SerialNumber FROM Win32_DiskDrive WHERE Index = 0");
   foreach (ManagementObject obj in searcher.Get())
   {
       hwid += obj["SerialNumber"].ToString();
       break;
   }

   // Get the network adapter MAC address
   searcher = new ManagementObjectSearcher("SELECT MACAddress FROM Win32_NetworkAdapter WHERE AdapterType = 'Ethernet 802.3'");
   foreach (ManagementObject obj in searcher.Get())
   {
       hwid += obj["MACAddress"].ToString();
       break;
   }

   // Get the CPU ID
   searcher = new ManagementObjectSearcher("SELECT ProcessorId FROM Win32_Processor");
   foreach (ManagementObject obj in searcher.Get())
   {
       hwid += obj["ProcessorId"].ToString();
       break;
   }

   // Get the system BIOS version
   searcher = new ManagementObjectSearcher("SELECT Version FROM Win32_BIOS");
   foreach (ManagementObject obj in searcher.Get())
   {
       hwid += obj["Version"].ToString();
       break;
   }

   // Hash the Hwid string for security
   using (SHA256 sha256Hash = SHA256.Create())
   {
       byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(hwid));
       StringBuilder builder = new StringBuilder();
       for (int i = 0; i < bytes.Length; i++)
       {
           builder.Append(bytes[i].ToString("x2"));
       }
       hwid = builder.ToString();
   }

   return hwid;
}