using System;

using System.Linq;

using System.Security.Cryptography;

using System.Text;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(NewV8("at.permedio.pgx","drugs.products",255,12));

    }

          public static Guid NewV8(string domain, string path, byte language, long id)

      {

         using var sha1 = SHA1.Create();

​

         var domainHash = sha1.ComputeHash(Encoding.UTF8.GetBytes(domain));

         var pathHash = sha1.ComputeHash(Encoding.UTF8.GetBytes(path));

         var idBytes = BitConverter.GetBytes(id).Reverse().ToArray();

​

         var bytes = new byte[16];

​

         domainHash.Take(4).ToArray().CopyTo(bytes, 0);

         pathHash.Take(2).ToArray().CopyTo(bytes, 4);

​

         bytes[6] = (byte)((8 << 4) | (language >> 4));

         bytes[7] = (byte)((language << 4) | (idBytes[0] >> 4));

         bytes[8] = (byte)((1 << 7) | (idBytes[0] << 4));

         idBytes.Skip(1).ToArray().CopyTo(bytes, 9);

​

         return new Guid(bytes);

      }

}