using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Welcome to the to do list program");

        List<string> taskList = new List<string>();

        string option = "";

        while(option != "e")

        {

            Console.WriteLine("What would you like to do?");

            Console.WriteLine("Enter 1 to add a task to the list.");

            Console.WriteLine("enter 2 to remove a task for the list");

            Console.WriteLine("Enter 3 to view the list");

            Console.WriteLine("Enter e to exit the program");

            option = Console.ReadLine();

            if(option == "1")

            {

                Console.WriteLine("Please enter the name of the task  to add to the list.");

                string task = Console.ReadLine();

                taskList.add(task);

                Console.WriteLine("Task added to the list");    

            }

            else if(option == "2")

            {

                for(int i = 0; i < taskList.Count; i++)

                {

                    Console.WriteLine(i + " : " + taskList[i]);

                }

                Console.WriteLine("Please enter the number of the task to remove from the list");

                int taskNumber = Convert.ToInt32(Console.ReadLine());

                taskList.RemoveAt(taskNumber);

            }

            else if (option == "3")

            {

                Console.WriteLine("Current tasks in the list");

                for(int i = 0; i < taskList.Count; i++)

                {

                    Console.WriteLine(taskList[i]);

                }

            }

            else if(option == "e")

            {

                Console.WriteLine("Exiting program");

            }

            else 

            {

                Console.WriteLine("Invaild option, please try agian.");

            }

        }

        Console.WriteLine("Thank you for using the program!");

    }

}