Command Interpreter

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

namespace Exam_Preparation_III
{
    class Program
    {
        static void Main(string[] args)
        {
            var input = Console.ReadLine();

            List<string> inputArray = input.Split(new[] {' '}, StringSplitOptions.RemoveEmptyEntries).ToList();

            string inputCommand = Console.ReadLine();

            while (inputCommand != "end")
            {
                List<string> command = inputCommand.Split(' ').ToList();
                switch (command[0])
                {
                    case "reverse":
                        int start = int.Parse(command[2]);
                        int count = int.Parse(command[4]);
                        if (start >= inputArray.Count || count > inputArray.Count - start || start < 0 || count < 0)
                        {
                            Console.WriteLine("Invalid input parameters.");
                        }
                        else
                        {
                            inputArray.Reverse(start, count);
                        }
                        break;

                    case "sort":
                        start = int.Parse(command[2]);
                        count = int.Parse(command[4]);
                        if (start >= inputArray.Count || count > inputArray.Count - start || start < 0 || count < 0)
                        {
                            Console.WriteLine("Invalid input parameters.");
                        }
                        else
                        {
                            inputArray.Sort(start, count, StringComparer.InvariantCulture);
                        }
                        break;

                    case "rollLeft":
                        count = int.Parse(command[1]);
                        if (count >= 0)
                        {
                            for (int i = 0; i < count % inputArray.Count; i++)
                            {
                                string firstElement = inputArray[0];

                                for (int j = 0; j < inputArray.Count - 1; j++)
                                {
                                    inputArray[j] = inputArray[j + 1];
                                }

                                inputArray[inputArray.Count - 1] = firstElement;
                            }
                        }
                        else
                        {
                            Console.WriteLine("Invalid input parameters.");
                        }
                        break;

                    case "rollRight":
                        count = int.Parse(command[1]);
                        if (count >= 0)
                        {
                            for (int i = 0; i < count % inputArray.Count; i++)
                            {
                                string lastElement = inputArray[inputArray.Count - 1];

                                for (int j = inputArray.Count - 1; j > 0; j--)
                                {
                                    inputArray[j] = inputArray[j - 1];
                                }

                                inputArray[0] = lastElement;
                            }
                        }
                        else
                        {
                            Console.WriteLine("Invalid input parameters.");
                        }
                        break;
                }

                inputCommand = Console.ReadLine();
            }
            Console.WriteLine("[" + (string.Join(", ", inputArray)) + "]");
        }
    }
}