using System;

using System.Threading;

​

public class Program

{

    private static int sharedValue = 0; // Shared variable

​

    public static void Main()

    {

        // Thread that updates the value

        Thread writerThread = new Thread(() =>

        {

            for (int i = 1; i <= 5; i++)

            {

                Interlocked.Exchange(ref sharedValue, i); // Atomically writes the value

                Console.WriteLine($"Writer Thread: wrote {i}");

                Thread.Sleep(500); // Simulates slow activity

            }

        });

​

        // Thread that reads the value

        Thread readerThread = new Thread(() =>

        {

            int previousValue = -1;

            while (true)

            {

                int currentValue = Volatile.Read(ref sharedValue); // Atomically reads the value

                if (currentValue != previousValue)

                {

                    Console.WriteLine($"Reader Thread: read {currentValue}");

                    previousValue = currentValue;

                }

​

                if (currentValue == 5) break; // Terminates when the value is 5

            }

        });

​

        // Start the threads

        writerThread.Start();

        readerThread.Start();

​

        // Wait for the threads to finish

        writerThread.Join();

        readerThread.Join();

​

        Console.WriteLine("Execution complete.");

    }

}