CSLight #19

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

namespace CSLight
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] fullNames = { "Иванов Иван Иванович" };
            string[] positions = { "Программист" };

            int userChoice;
            bool isWorking = true;

            while (isWorking)
            {
                Console.WriteLine("1) добавить досье\n2) вывести все досье\n3) удалить досье\n4) поиск по фамилии\n5) выход\n");
                userChoice = Convert.ToInt32(Console.ReadLine());
                Console.Clear();
                switch (userChoice)
                {
                    case 1:
                        AddDossier(ref fullNames, ref positions);
                        break;
                    case 2:
                        PrintDossier(fullNames, positions);
                        break;
                    case 3:
                        DeleteDossier(ref fullNames, ref positions);
                        break;
                    case 4:
                        Search(fullNames, positions);
                        break;
                    case 5:
                        isWorking = false;
                        break;
                    default:
                        Console.WriteLine("\nПовторите ввод:");
                        break;
                }
                Console.ReadKey();
                Console.Clear();
            }
        }

        static void PrintDossier(string[] fullNames, string[] positions)
        {
            Console.WriteLine("Список сотрудников:");
            for (int i = 0; i < fullNames.Length; i++)
            {
                Console.Write($"{i + 1}. " + fullNames[i] + " - " + positions[i] + "  ");
            }
        }

        static void DeleteDossier(ref string[] fullNames, ref string[] positions)
        {
            string fullName;
            int indexForDelete = 0;

            string[] tempFullNames = new string[fullNames.Length - 1];
            string[] tempPositions = new string[positions.Length - 1];

            Console.WriteLine("Введите инициалы сотрудника: ");
            fullName = Console.ReadLine();

            for (int i = 0; i < fullNames.Length; i++)
            {
                if (fullNames[i].Contains(fullName))
                {
                    indexForDelete = i;
                }
            }

            for (int i = 0; i < indexForDelete; i++)
            {
                tempFullNames[i] = fullNames[i];
                tempPositions[i] = positions[i];
            }

            for (int i = indexForDelete + 1; i < fullNames.Length; i++)
            {
                tempFullNames[i - 1] = fullNames[i];
                tempPositions[i - 1] = positions[i];
            }

            ReplaceArray(ref tempFullNames, ref fullNames, ref tempPositions, ref positions);
        }

        static void AddDossier(ref string[] fullNames, ref string[] positions)
        {
            string fullName;
            string position;

            string[] tempFullNames = new string[fullNames.Length + 1];
            string[] tempPositions = new string[positions.Length + 1];

            Console.WriteLine("Введите ФИО сотрудника:");
            fullName = Console.ReadLine();
            Console.WriteLine("\nВведите должность сотрудника: ");
            position = Console.ReadLine();

            for (int i = 0; i < fullNames.Length; i++)
            {
                tempFullNames[i] = fullNames[i];
                tempPositions[i] = positions[i];
            }

            tempFullNames[tempPositions.Length - 1] = fullName;
            tempPositions[tempPositions.Length - 1] = position;

            ReplaceArray(ref tempFullNames, ref fullNames, ref tempPositions, ref positions);
        }

        static void ReplaceArray(ref string[] previousFullNames, ref string[] presentFullNames, ref string[] previousPositions, ref string[] presentPositions)
        {
            presentFullNames = previousFullNames;
            presentPositions = previousPositions;
        }

        static void Search(string[] fullNames, string[] positions)
        {
            Console.WriteLine("Введите фамилию сотрудника: ");
            string lastName = Console.ReadLine();

            for (int i = 0; i < fullNames.Length; i++)
            {
                if (fullNames[i].Contains(lastName))
                {
                    Console.WriteLine("\n" + fullNames[i] + " занимает должность " + positions[i]);
                }
                else
                {
                    if (i == fullNames.Length - 1)
                    {
                        Console.WriteLine("\nНет сотрудников с такой фамилией");
                    }
                }
            }
        }
    }
}