using System;

using System.Collections;

​

​

​

public class Program

{

    public static void Main()

    {

         ArrayList arr= new ArrayList(); 

            bool acceptFlag=false;

            while(!acceptFlag)

            {

                Console.WriteLine("Enter some integer");

                arr.Add(int.Parse(Console.ReadLine()));

                Console.WriteLine("Do you want to continue? Y/N");

                char accept= char.Parse(Console.ReadLine().ToUpper());

                if(accept=='Y')

                {

                acceptFlag=false;

                }

                else

                {

                acceptFlag=true;

                }

            }

            Console.WriteLine("------------------------");

            Console.WriteLine("entered elements are: ");

            foreach(Object x in arr){

                Console.WriteLine(x);

            }

        Console.WriteLine("------------------------");

            Console.WriteLine("number of integers in the arraylist : "+ arr.Count);

        float average=0;

        int sum=0;

        foreach(int x in arr){

               sum+=x;

            }

        average=(float)sum/arr.Count;

        Console.WriteLine("------------------------");

            Console.WriteLine("average of integers in the arraylist : "+ average);

        if(arr.Count%2==0){

            int mid=arr.Count/2;

            arr.Insert(mid,average);

        }else{

            int mid=arr.Count/2 +1;

            arr.Insert(mid,average);

        }

        Console.WriteLine("------------------------");

            Console.WriteLine("modified elements are: ");

            foreach(Object x in arr){

                Console.WriteLine(x);

            }

        arr.RemoveAt(2);

        Console.WriteLine("------------------------");

            Console.WriteLine("entered elements are: ");

            foreach(Object x in arr){

                Console.WriteLine(x);

            }

        arr.Remove(average);

        Console.WriteLine("------------------------");

            Console.WriteLine("entered elements are: ");

            foreach(Object x in arr){

                Console.WriteLine(x);

            }

    }

​

}