using System;

using System.Linq;

​

public enum Size 

{

    XS = 34,

    S = 36, 

    M = 38,

    L = 40,

    XL = 42,

    XXL = 44

}

​

public class Item

{

    public int Id { get; set; }

    public string Name { get; set; }

    public Size Size { get; set; }

    public double Price { get; set; }

    public override string ToString()

    {

        return $"{Id}: {Name} size {Size.ToString()}, {Price} zł";

    }

}

public class Program

{

    public static readonly Item[] Items = {

        new Item() { Id = 1, Name = "Stella pants", Size = Size.M, Price = 39.99 },

        new Item() { Id = 2, Name = "Stella pants", Size = Size.S, Price = 39.99 },

        new Item() { Id = 3, Name = "Silk blause", Size = Size.XS, Price = 89.39 },

        new Item() { Id = 4, Name = "Tank top Marcella", Size = Size.M, Price = 19.99 },

        new Item() { Id = 5, Name = "Jumpsuit Donovan", Size = Size.L, Price = 59.99 },

        new Item() { Id = 6, Name = "Jumpsuit Juliet", Size = Size.S, Price = 45.89 },

        new Item() { Id = 7, Name = "Wool blause", Size = Size.XL, Price = 39.19 },

    };

    public static void Main()

    {

        // 1. Wyswietl itemy alfabetycznie po nazwie

        var result = Items.OrderBy(x => x.Name);

        foreach(Item el in result) 

        {

        Console.WriteLine(el);

        }

        Console.WriteLine(); // odstęp

        // 2. Wyswietl itemy posortowane od najtańszych, a następnie alfabetycznie

        var result2 = Items.OrderBy(x => x.Price).ThenBy(x => x.Name);

        foreach(Item el in result2) 

        {

        Console.WriteLine(el);

        }

        Console.WriteLine(); // odstęp

        // 3. Wyswietl itemy posortowane malejąco po rozmiarze

        var result3 = Items.OrderByDescending(x => x.Size);

        foreach(Item el in result3) 

        {

        Console.WriteLine(el);

        }

        Console.WriteLine(); // odstęp

    }

​

}