Semaphores

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

namespace ConsoleApp23
{
    class Program
    {
        public static Semaphore semaphore = new Semaphore(3, 5);
        public static void Main(string[] args)
        {
            for (int i = 0; i < 10; i++)
            {
                Thread threadObject = new Thread(Process);
                threadObject.Name = "Thread: " + i;
                threadObject.Start();
            }
            Console.ReadLine();
        }
        private static void Process()
        {
            Console.WriteLine("{0} is waiting to enter the critical section.", Thread.CurrentThread.Name);
            semaphore.WaitOne();
            Console.WriteLine("{0} is inside the critical section now...", Thread.CurrentThread.Name);
            Thread.Sleep(1000);
            Console.WriteLine("{0} is releasing the critical section...", Thread.CurrentThread.Name);
            semaphore.Release();
        }
    }
}