M0. Многопоточное программирование

using System;
using System.Threading;

namespace ParallelWork;

class Program
{
    static object locker = new object();
    static int sharedData;

    static void Main(string[] args)
    {
        var readerThread = new Thread(Reader);
        var writerThread = new Thread(Writer);
        readerThread.Start();
        writerThread.Start();
    }

    static void Reader()
    {
        while (true)
        {
            lock (locker)
            {
                Thread.Sleep(2000);
                Console.WriteLine("ReaderThread {0} считал данные: {1}", Thread.CurrentThread.ManagedThreadId, sharedData);
            }
        }
    }

    static void Writer()
    {
        while (true)
        {
            lock (locker)
            {
                Thread.Sleep(2000);
                sharedData++;
                Console.WriteLine("WriterThread {0} записал данные: {1}", Thread.CurrentThread.ManagedThreadId, sharedData);
            }
        }
    }
}