Array Manipulator C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp6
{
    class Program
    {
        static void Main(string[] args)
        {
            //List<int> nums = Console.ReadLine().Split(' ').Select(int.Parse).ToList();
            string[] input = Console.ReadLine().Split(' ');
            List<int> nums = new List<int>();

            foreach (var item in input)
            {
                nums.Add(int.Parse(item));
            }

            List<string> command = new List<string>(3);

            do
            {

                command = Console.ReadLine().Split(' ').ToList();
                switch (command[0])
                {
                    case "add":
                        {
                            nums.Insert(int.Parse(command[1]), int.Parse(command[2]));
                            break;
                        }

                    case "addMany":
                        {
                            nums.InsertRange(int.Parse(command[1]), command.Skip(2).Select(int.Parse).ToArray());
                            break;
                        }
                    case "contains":
                        {

                            Console.WriteLine(nums.IndexOf(int.Parse(command[1])));
                            break;
                        }

                    case "remove":
                        {
                            nums.RemoveAt(int.Parse(command[1]));
                            break;
                        }

                    case "shift":
                        {
                            int shiftCycles = int.Parse(command[1]);
                            while (shiftCycles > 0)
                            {
                                int first = nums[0];
                                nums.RemoveAt(0);
                                nums.Add(first);
                                shiftCycles--;

                            }
                            break;
                        }

                    case "sumPairs":
                        {
                            for (int i = 0; i < nums.Count - 1; i++)
                            {
                                nums[i] = nums[i] + nums[i + 1];
                                nums.RemoveAt(i + 1);
                            }
                            break;
                        }
                }

            }
            while (command[0] != "print");

            Console.WriteLine($"[{string.Join(", ", nums)}]");
        }
    }
}