using System;

public class Program

{

            private static Random rnd = new Random();

    public static void Main()

    {

        Console.WriteLine(CreateRandomPassword(6));

    }

​

            private static string CreateRandomPassword(int passwordLength)

        {

            string allowedChars = "ACEFHJKLMNPQRTUXY3479";// "abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ0123456789!@$?_-";

            char[] chars = new char[passwordLength];

​

            for (int i = 0; i < passwordLength; i++)

                chars[i] = allowedChars[rnd.Next(0, allowedChars.Length)];

​

            return new string(chars);

        }

}

​