using System;

​

public class Program

{

    public static void Main()

    {

        V instanceSingleton = V.instance;

        //Console.WriteLine(new V().a);

        for (int i = 0; i < 3; i++)

        {

            instanceSingleton.print();

            Console.WriteLine();

        }

    }

}

​

public class V

{

    public static readonly V instance = new V();

    static V()

    {

    }

​

    private V()

    {

    }

​

    public V Instance

    {

        get

        {

            return instance;

        }

    }

​

    private int a = 5;

    public void print()

    {

        int a = 10;

        Console.WriteLine(a);

        Console.WriteLine(this.a);

    }

}