Array manipulator

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

public class Soft
{
    public static void Main()
    {



        List<int> nums = Console.ReadLine().Split(' ').Select(int.Parse).ToList();

        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)}]");

    }
}