using System;

using System.Text;

using System.Linq;

using System.Security.Cryptography;

​

public class Program

{

    public static void Main()

    {

        var buffer = new byte[10];

        new Random().NextBytes(buffer);

        var password = "Lucas";

        var salt = Encoding.UTF8.GetString(buffer);

        Console.WriteLine("Password antes do hash: '{0}'", password);

        Console.WriteLine("Salto: '{0}'", salt);

        Console.WriteLine("Salto + Password: '{0}'", salt + password);

        Console.WriteLine("Hash da senha: '{0}'", Hash(salt + password));

        Console.WriteLine("Agora é só salvar '{0}' em um campo e '{1}' no outro no banco.", salt, Hash(salt + password));

    }

​

    public static string Hash(string input)

    {

        var hash = (new SHA1Managed()).ComputeHash(Encoding.UTF8.GetBytes(input));

        return string.Join("", hash.Select(b => b.ToString("x2")).ToArray());

    }

}