using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        // Create a List of integers

        List<int> numbers = new List<int>();

​

        // Add elements to the List

        numbers.Add(10);

        numbers.Add(20);

        numbers.Add(30);

​

        // Display elements using a loop

        Console.WriteLine("List elements:");

        foreach (int num in numbers)

        {

            Console.WriteLine(num);

        }

​

        // Insert an element at a specific index

        numbers.Insert(1, 15);

​

        // Display updated elements

        Console.WriteLine("\nList elements after insertion:");

        foreach (int num in numbers)

        {

            Console.WriteLine(num);

        }

​

        // Remove an element

        numbers.Remove(20);

​

        // Display updated elements

        Console.WriteLine("\nList elements after removal:");

        foreach (int num in numbers)

        {

            Console.WriteLine(num);

        }

​

        // Check if an element exists in the list

        bool containsElement = numbers.Contains(15);

        Console.WriteLine("\nDoes the list contain 15? " + containsElement);

​

        // Find the index of an element

        int indexOfElement = numbers.IndexOf(30);

        Console.WriteLine("\nIndex of 30: " + indexOfElement);

​

        // Sorting the list

        numbers.Sort();

​

        // Display sorted elements

        Console.WriteLine("\nList elements after sorting:");

        foreach (int num in numbers)

        {

            Console.WriteLine(num);

        }

​

        // Clear all elements from the list

        numbers.Clear();

​

        // Display the list after clearing

        Console.WriteLine("\nList elements after clearing:");

        foreach (int num in numbers)

        {

            Console.WriteLine(num);

        }

        Console.WriteLine("\nBy Amal Prakash\nSection:- A\nRoll No.:- 10");

    }

}

​