using System;

​

namespace data

{

    public class test

    {

        public static int count = 0;

        public test()

        {

            count = count + 1;

        }

    }

​

    public class Program

    {

        public static void Main()

        {

            test obj1 = new test();

            test obj2 = new test();

            test obj3 = new test();

            test obj4 = new test();

            Console.WriteLine(data.test.count);

        }

    }

}