using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        Console.WriteLine("֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎         SORTING LIST OF INT     ֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        Console.WriteLine("֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        List<int> intList = new List<int>(){25, 34, 131, 1, 24, 68, 5, 258, -1};

        Console.WriteLine("֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎      UNSORTED LIST OF INT    ֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        foreach(int a in intList)

            Console.WriteLine(a);

        intList.Sort();

        Console.WriteLine("\n\n֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎      SORTED LIST OF INT  ֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        foreach(int a in intList)

            Console.WriteLine(a);

        intList.Reverse();

        Console.WriteLine("֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎      REVERSE SORTED LIST OF INT  ֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        foreach(int a in intList)

            Console.WriteLine(a);

        Console.WriteLine("֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        Console.WriteLine("֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎         SORTING LIST OF STRING      ֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        Console.WriteLine("֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        List<string> strList = new List<string>(){"Anna", "Alberto", "Pippo", "Ada", "Stefano", "Carla", "Gino"};

        Console.WriteLine("֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎      UNSORTED LIST OF STRING ֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        foreach(string a in strList)

            Console.WriteLine(a);

        strList.Sort();

        Console.WriteLine("\n\n֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎      SORTED LIST OF STRING       ֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        foreach(string a in strList)

            Console.WriteLine(a);

        strList.Reverse();

        Console.WriteLine("֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎      REVERSE SORTED LIST OF STRING   ֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        foreach(string a in strList)

            Console.WriteLine(a);

// ֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎

// ֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎                 SORTING OBJECTS             ֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎

// ֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎

        Customer c1 = new Customer();

        Customer c2 = new Customer();

        Customer c3 = new Customer();

        c1.ID = 101;                c1.Name="James";                c1.Salary=2500;

        c2.ID = 201;                c2.Name="Tina";                 c2.Salary=5500;

        c3.ID = 301;                c3.Name="Mark";                 c3.Salary=4500;

        Console.WriteLine("\n\n");

        Console.WriteLine("֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        Console.WriteLine("֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎         SORTING LIST OF OBJECTS     ֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        Console.WriteLine("֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎֎");

        List<Customer> listCust = new List<Customer>(){c1, c2, c3};

        listCust.Sort();

        foreach(Customer c in listCust)

            Console.WriteLine("Customer ID {0},\t\tName is {1},\t\tsalary is {2}", c.ID.ToString(), c.Name, c.Salary.ToString());

    }

    public class Customer : IComparable<Customer>

    {

        public int ID {get; set;}

        public string Name {get; set;}

        public int Salary {get; set;}

    /*  

        public int CompareTo(Customer obj)

        {

            if(this.Salary > obj.Salary)

                return 1;

            else if(this.Salary < obj.Salary)

                return -1;

            else

                return 0;

        }

*/

    // >>>>>>>>>>       TRY ALSO THIS COMPARE BELOW: IT'S EASIER        <<<<<<<<<<<<<<<<<<<<

        public int CompareTo(Customer obj) {    return this.Salary.CompareTo(obj.Salary);       }

    }

}