using System;
using System.Collections.Generic;

namespace TodoListApp
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> tasks = new List<string>();
            string task;

            Console.WriteLine("C# To-Do List\n");

            while (true)
            {
                Console.WriteLine("Options:");
                Console.WriteLine("1. Add Task");
                Console.WriteLine("2. View Tasks");
                Console.WriteLine("3. Quit");

                Console.Write("Enter your choice: ");
                int choice = Convert.ToInt32(Console.ReadLine());

                switch (choice)
                {
                    case 1:
                        Console.Write("Enter a task: ");
                        task = Console.ReadLine();
                        tasks.Add(task);
                        Console.WriteLine("Task added.");
                        break;
                    case 2:
                        Console.WriteLine("Tasks:");
                        for (int i = 0; i < tasks.Count; i++)
                        {
                            Console.WriteLine($"{i + 1}. {tasks[i]}");
                        }
                        break;
                    case 3:
                        Console.WriteLine("Goodbye!");
                        return;
                    default:
                        Console.WriteLine("Invalid choice.");
                        break;
                }
            }
        }
    }
}