using System;

​

namespace HelloFunctional

{

    public class Program

    {

        public static void Main(string[] args)

        {

            Func<int, int> f = (x) => x + 2;

            int i = f(1);

            Console.WriteLine(i);

​

            f = (x) => 2 * x + 1;

            i = f(1);

            Console.WriteLine(i);

​

            Console.WriteLine("Press [Enter] to exist.");

            Console.ReadLine();

        }

    }

}