Stopwatch and ReadKey doesn't work properly : I'm working on my multi threading password cracker, only numbers. It must show the how much time has passed to find the password. I used Stopwatch to find it, but in functions, stopwatch doesn't works..

here is my code

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Diagnostics;
    using System.Threading;


    namespace ConsoleApplication4
    {
    class Program
    {


        static void Main(string[] args)
        {
            int psw = 14995399;


            Stopwatch time = new Stopwatch();

            Thread Thread1 = new Thread(islem1);
            Thread Thread2 = new Thread(islem2);
            Thread Thread3 = new Thread(islem3);
            Thread Thread4 = new Thread(islem4);

            time.Start();

            Thread1.Start();
            Thread2.Start();
            Thread3.Start();
            Thread4.Start();

            Thread.Sleep(1000);

            time.Stop();
            System.Console.WriteLine("Time elapsed: {0}", time.Elapsed);
            Console.ReadKey();
        }





        static void islem1()
        {
            for (int i = 00000000; i < 25000000; i++)
            {
                int psw = 14995399;
                if (i == psw)
                {
                    System.Console.WriteLine("Şifre=" + i);
                    
                    time.Stop();
                    Console.WriteLine("Time elapsed: {0}", time.Elapsed);
                    Console.ReadKey();
                }
            }
        }


        static void islem2()
        {
            for (int i = 25000000; i < 50000000; i++)
            {
                int psw = 14995399;
                if (i == psw)
                {
                    System.Console.WriteLine("Şifre=" + i);

                    time.Stop();
                    Console.WriteLine("Time elapsed: {0}", time.Elapsed);
                    Console.ReadKey();



                }
            }
        }


        static void islem3()
        {
            for (int i = 50000000; i < 75000000; i++)
            {
                int psw = 14995399;
                if (i == psw)
                {
                    System.Console.WriteLine("Şifre=" + i);

                    time.Stop();
                    Console.WriteLine("Time elapsed: {0}", time.Elapsed);
                    Console.ReadKey();
                }
            }
        }


        static void islem4()
        {
            for (int i = 75000000; i < 100000000; i++)
            {
                int psw = 14995399;
                if (i == psw)
                {
                    System.Console.WriteLine("Şifre=" + i);

                    time.Stop();
                    Console.WriteLine("Time elapsed: {0}", time.Elapsed);
                    Console.ReadKey();
                }
            }
        }

    }
    }
