using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace CSharp_Assignment_3

{

    public sealed class Customers

    {

        static public void Meals(object LChopstick, object RChopstick, int NoPerson, int leftChopstickNo, int rightChopstickNo)

        {

            lock (LChopstick)

            {

                Console.WriteLine("   Customer {0} picked {1} chopstick.", NoPerson, leftChopstickNo);

                lock (RChopstick)

                {

                    Console.WriteLine("   Customer {0} picked {1} chopstick.", NoPerson, rightChopstickNo);

                    Console.WriteLine("Customer {0} Meals.", NoPerson);

                }

​

                Console.WriteLine("   Customer {0} released {1} chopstick.", NoPerson, rightChopstickNo);

            }

​

            Console.WriteLine("   Customer {0} released {1} chopstick.", NoPerson, leftChopstickNo);

        }

    }

​

    public class Program

    {

        public static void Main(string[] args)

        {

            const int NoPerson = 5;

            var chopsticks = new Dictionary<int, object>(NoPerson);

            for (int i = 0; i < NoPerson; ++i)

            {

                chopsticks.Add(i, new object ());

            }

​

            Task[] tasks = new Task[NoPerson];

            tasks[0] = new Task(() => Customers.Meals(chopsticks[0], chopsticks[NoPerson - 1], 0 + 1, 1, NoPerson));

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

            {

                int ix = i;

                tasks[ix] = new Task(() => Customers.Meals(chopsticks[ix - 1], chopsticks[ix], ix + 1, ix, ix + 1));

            }

​

            Parallel.ForEach(tasks, t =>

            {

                t.Start();

            }

​

            );

        }

    }

}