using System;

using System.Security.Cryptography;

using System.Text;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(GenerateRandomSimplePassword());

    }

​

    private static readonly RNGCryptoServiceProvider Rng = new RNGCryptoServiceProvider();

​

    internal static string GenerateRandomSimplePassword()

    {

        var seedBytes = new byte[4];

        Rng.GetBytes(seedBytes);

        int seed = BitConverter.ToInt32(seedBytes, 0);

        var rnd = new Random(seed);

        return CreateMD5(rnd.Next().ToString()).Substring(1, 7);

        string CreateMD5(string input)

        {

            using (MD5 md5 = MD5.Create())

            {

                byte[] inputBytes = Encoding.ASCII.GetBytes(input);

                byte[] hashBytes = md5.ComputeHash(inputBytes);

                var sb = new StringBuilder();

                foreach (byte b in hashBytes)

                    sb.Append(b.ToString("X2"));

                return sb.ToString();

            }

        }

    }

}