List\List Manipulation Basics

using System;
using System.Linq;
using System.Collections.Generic;

namespace fundamental14
{
    class MainClass
    {
        public static void Main()
        {
            string input = string.Empty;
            List<int> number = Console.ReadLine().Split().Select(int.Parse).ToList();

            while((input = Console.ReadLine()) != "end")
            {
                List<string> command = input.Split().ToList();
                int amount = int.Parse(command[1]);
                if (command[0] == "Add")
                {
                    number.Add(amount);
                }
                else if (command[0] == "Remove")
                {
                    number.Remove(amount);
                }
                else if (command[0] == "RemoveAt")
                {
                    number.RemoveAt(amount);
                }
                else if (command[0] == "Insert")
                {
                    int index = int.Parse(command[2]);
                    number.Insert(index, amount);
                }
            }

        Console.WriteLine(string.Join(" ", number));
        }
    }
}