using System;

using System.Security.Cryptography;

using System.Text;

using System.Linq;

using System.Threading;

​

public class Program

{

    public static void Main()

    {

        var passwords= new string [100];

​

        for(var i=0; i< 100; i++){

                    var random = new Random();

            passwords[i] =  RandomString(8, random);

               Thread.Sleep(1);

        }

        for(var i=0; i< 100; i++){

                    Console.WriteLine(passwords[i]+ "; " + Encode(passwords[i]));

        }

​

    }

    public static string RandomString(int length, Random random)

{

​

    const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!#%&";

    return new string(Enumerable.Repeat(chars, length)

        .Select(s => s[random.Next(s.Length)]).ToArray());

}

      public static string Encode(string plainPassword)

        {

            byte[] hash = ComputeHash(plainPassword);

            return ToStringAsHexa(hash);

        }

​

        private static byte[] ComputeHash(string plainPassword)

        {

            byte[] unicodeBytes = Encoding.Unicode.GetBytes(plainPassword);

            return new SHA256Managed().ComputeHash(unicodeBytes);

        }

​

        private static string ToStringAsHexa(byte[] bytes)

        {

            StringBuilder result = new StringBuilder();

            foreach (byte b in bytes)

            {

                result.AppendFormat("{0:x2}", b);

            }

​

            return result.ToString();

        }

}