04.List Operations

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

namespace _04.ListOperations
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> numbers = Console.ReadLine().Split().Select(int.Parse).ToList();

            while (true)
            {
                List<string> command = Console.ReadLine().Split().ToList();

                if (command.Contains("End"))
                {
                    Console.WriteLine(string.Join(" ", numbers));
                    return;
                }
                else if (command.Contains("Add"))
                {
                    numbers.Add(int.Parse(command[1]));
                }
                else if (command.Contains("Insert"))
                {
                    int index = int.Parse(command[2]);
                    if (index<numbers.Count)
                    {
                        int number = int.Parse(command[1]);
                        numbers.Insert(index, number);
                    }
                    else
                    {
                        Console.WriteLine("Invalid index");
                    }
                }
                else if (command.Contains("Remove"))
                {
                    int index = int.Parse(command[1]);
                    if (index<numbers.Count)
                    {
                        numbers.RemoveAt(index);
                    }
                    else
                    {
                        Console.WriteLine("Invalid index");
                    }
                }
                else if (command.Contains("left"))
                {
                    int count = int.Parse(command[2]);
                    for (int i = 1; i <= count; i++)
                    {
                        numbers.Add(numbers[0]);
                        numbers.RemoveAt(0);
                    }
                }
                else if (command.Contains("right"))
                {
                    int count = int.Parse(command[2]);
                    for (int i = 1; i <= count; i++)
                    {
                        numbers.Insert(0, numbers[numbers.Count - 1]);
                        numbers.RemoveAt(numbers.Count - 1);
                    }
                }
            }
        }
    }
}