Revise paste ДЗ: Кадровый учет

using System;

internal class Program
{
    static void Main(string[] args)
    {
        const string CommandExit = "Exit";
        const string CommandAddDossier = "1";
        const string CommandShowAllDossier = "2";
        const string CommandRemoveDossier = "3";
        const string CommandSearchByLastName = "4";

string[] employeeFullNames;
        string[] employeePositions;
        bool inProgram = true;

while (inProgram)
        {
            string userInput = Console.ReadLine();

switch (userInput)
            {
                case CommandAddDossier:
                    AddDossier();
                    break;
                case CommandShowAllDossier:
                    ShowAllDossier();
                    break;
                case CommandRemoveDossier:
                    RemoveDossier();
                    break;
                case CommandSearchByLastName:
                    SearchByLastName();
                    break;
                case CommandExit:
                    inProgram = false;
                    break;
                default:
                    Console.WriteLine("Ошибка ввода.");
                    break;
            }
        }
    }

static void AddDossier()
    {

}

static void ShowAllDossier()
    {

}

static void RemoveDossier()
    {

}

static void SearchByLastName()
    {

}