C#: Program #50(Using LAMDA)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace LambdaCode
{
    class Program
    {
        public delegate double Arithmetic(double val);
        static void Main(string[] args)
        {

            Arithmetic obj = x => ++x;
            Console.WriteLine(obj(5));
            obj = x => --x;
            Console.WriteLine(obj(6));
            obj = x => x / 2;
            Console.WriteLine(obj(7));
            obj = x => x * 2;
            Console.WriteLine(obj(8));


            Console.WriteLine("The even numbers are:");
            List<int> numbers = new List<int> {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20};
            var evenlist = numbers.Where(x => x % 2 == 0).ToList();
            foreach(int no in evenlist)
            {
                Console.WriteLine(no);
            }
            Console.WriteLine("The no between 2 and 5");
            var rangebetween = numbers.Where(a=>a>=2&&a<=5).ToList();
            foreach (int no in rangebetween)
            {
                Console.WriteLine(no);
            }


            Console.ReadKey();
        }
    }
}