using System;

using System.Collections.Generic;  //required to work with lists in C#

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Demo on Lists");

        int [] numArray = new int[5];  //array of only 5 integer values

        numArray[0]=11;  //initialize array

        numArray[1]=1;

        numArray[2]=3;

        numArray[3]=8;

        numArray[4]=0;

        Console.WriteLine("From numbers array ...");

        foreach(int i in numArray){

            Console.WriteLine(i);

        }

        Console.WriteLine("Length of numbers array: " + numArray.Length);

        List <int> numList = new List<int>(); //creates a new dynamic list of integer values

        numList.Add(11);   //adding elements into list

        numList.Add(1);

        numList.Add(3);

        numList.Add(8);

        numList.Add(0);

        numList.Add(21);  //keep growing

        numList.Remove(21); //remove the number 21

        Console.WriteLine("From numbers list ...");     

        foreach(int i in numList){

            Console.WriteLine(i);

        }

        Console.WriteLine("Count: " + numList.Count);

        if (numList.Contains(0))

            Console.WriteLine("Num list contains 0.");

        Console.WriteLine(numList.IndexOf(0)+"");

    }

}