using System;

using System.Text.RegularExpressions;

​

namespace PasswordRegex

{

    class Program

    {

        static void Main(string[] args)

        {

            var regExPattern = "^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[±!@#$%^&*()_+{}:\"|<>?,.\\/;'\\\\[\\]])\\S{8,}$";

​

            var regEx = new Regex(regExPattern);

            PrintResult("J4ksMp4eKLWnUI#$9", regEx);

​

            PrintResult("9J4ksMp4eKLWnUI#$", regEx);

        }

​

        static void PrintResult(string password, Regex regEx)

        {

            var match = regEx.Match(password);

            Console.WriteLine($"{password}, result = {match.Success}"); 

        }

    }

}

​