using System;

using System.Collections.Generic;

using System.Linq;

​

namespace ConsoleApp1

{

    class Task1

    {

        public static void Main()

        {

            var items = new List<int> { 1, 2 };

​

            var query = items

                .Where(i =>

                { 

                    Console.Write(i + ".");

                    return true; 

                });

​

            foreach(var i in query)

                Console.Write(i + "-");

​

            Console.Write(">");

            items.Add(3);

​

            foreach (var i in query)

                Console.Write(i + "-");

        }

    }

}

​