using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{   

    public static void Print<T>(IEnumerable<T> iterable)

    {

        foreach(var elem in iterable)

            Console.WriteLine(elem);

    }

    public static void Main()

    {   

        var data = new List<(int, int)>{

            (1, 2),

            (2, 3),

            (3, 4), 

            (4, 5), 

            (6, 7), 

            (8, 9),

        };

        var methodStyle = (data

            .Where(elem => elem.Item1 % 2 == 0)

            .Select(elem => elem.Item2))

                .Where(x => x > 2); 

​

        var querySyle = 

            from elem in data

            where elem.Item1 % 2 == 0

            select elem.Item2

            into filterElems

            where filterElems > 2

            select filterElems;

​

        Print(methodStyle.ToArray());

        Print(queryStyle.ToArray());

    }

}