using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        // adding elements using add() method

        var primeNumbers = new List<int>();

        primeNumbers.Add(1);

        primeNumbers.Add(3);

        primeNumbers.Add(5);

        primeNumbers.Add(7);

        primeNumbers.Add(8);

        primeNumbers.Add(9);

        primeNumbers.Add(2);

        primeNumbers.Add(4);

        Console.WriteLine("No of elelemts: "+ primeNumbers.Count);

​

        var cities = new List<string>();

        cities.Add("Moskva");

        cities.Add("Barselona");

        cities.Add("Dubai");

        cities.Add("Madrid");

        cities.Add(null); // null is allowed

        Console.WriteLine("No of elelemts: " + cities.Count);

​

        // adding elements using collection initializer syntax

        var bigCities = new List<string>() {"Varna", "Sofiq", "Plavdiv", };

        Console.WriteLine("No of elelemts: " + bigCities.Count);

        var students = new List<Student>() { 

                new Student(){ Id = 1, Name="Ivan"},

                new Student(){ Id = 2, Name="Georgi"},

                new Student(){ Id = 3, Name="Kristiqn"},

                new Student(){ Id = 4, Name="Presiqn"}

            };

        Console.WriteLine("No of elelemts: " + students.Count);

    }

}

​

class Student{

    public int Id { get; set; }

    public string Name { get; set; }

}