using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        string[] people =

        {

            "Tom",

            "Alice",

            "Bob",

            "Sam",

            "Tim",

            "Tomas",

            "Bill"

        };

        var selectedPeople = people.Where(p => p.Length >= 4); // "Tom", "Bob", "Sam", "Tim"

        foreach (string person in selectedPeople)

            Console.WriteLine(person);

        int[] numbers =

        {

            3,

            12,

            4,

            10

        };

        var orderedNumbers =

            from i in numbers

            orderby i

            select i;

        foreach (int i in orderedNumbers)

            Console.WriteLine(i);

        var orderedPeope =

            from i in people

            orderby i descending

            select i;

        foreach (string i in orderedPeope)

            Console.WriteLine(i);

    }

}