using System;

using System.Linq;

using System.Threading.Tasks;

​

public class Program

{

    public static void Main()

    {

        var numbers = Enumerable.Range(0, 10);

        Parallel.ForEach(numbers, i =>

        {

            var vm = VoteMachine.Instance;

            vm.RegisterVote();

        });

        Console.WriteLine(VoteMachine.Instance.TotalVotes);

    }

}

​

public class VoteMachine

{

    private static readonly VoteMachine _instance = new VoteMachine();

    private int _totalVotes = 0;

    static VoteMachine()

    {

    }

​

    private VoteMachine()

    {

    }

​

    public static VoteMachine Instance

    {

        get

        {

            return _instance;

        }

    }

​

    public void RegisterVote()

    {

        _totalVotes += 1;

        Console.WriteLine("Registered Vote #" + _totalVotes);

    }

​

    public int TotalVotes

    {

        get

        {

            return _totalVotes;

        }

    }

}