using System;

using System.Text;

using System.Security.Cryptography;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string SBME2SN="4340FA2431595";

        Console.WriteLine("SBME2 SN=" + SBME2SN);

        byte[] hashBytes;

        //convert the hex string in byte array

        byte[] inputBytes = BitConverter.GetBytes(Convert.ToUInt64(SBME2SN, 16));

​

        //revert for little endian

        Array.Reverse(inputBytes);

        //remove trailing 0 bytes

        inputBytes = inputBytes.SkipWhile(x => x == 0).ToArray();

​

        using (MD5 md5 = MD5.Create())

        {

            hashBytes = md5.ComputeHash(inputBytes);

        }

​

        // Prendi solo i primi 4 byte dell'hash

        byte[] truncatedHash = new byte[4];

        Array.Copy(hashBytes, truncatedHash, 4);

​

        // Converte i byte in un valore numerico (int32)

        uint hashValue = (uint)BitConverter.ToInt32(truncatedHash, 0);

​

        Console.WriteLine("SBME SN=" + hashValue);

    }

}