Shuffle

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

namespace ConsoleApp12
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] numbers = new int[] { 1, 2, 3, 4, 5 };
            bool exit = false;
            int menuBar = 0;
            string[] menu = { "1. Вывести массив.", "2. Перемешать массив.", "3. Выйти." };
            Console.CursorVisible = false;
            while (exit == false)
            {
                string selectMenuParagraph;
                DrawMenu(menuBar, menu);
                ChangeDirection(ref menuBar, menu, out selectMenuParagraph);
                Console.Clear();
                switch (selectMenuParagraph)
                {
                    case "1. Вывести массив.":
                        DrawaArray(numbers);
                        break;
                    case "2. Перемешать массив.":
                        Shuffle(numbers);
                        break;
                    case "3. Выйти.":
                        exit = true;
                        break;
                }
            }
        }

        static void DrawaArray(int[] array)
        {
            Console.SetCursorPosition(30, 0);
            for (int i = 0; i < array.Length; i++)
            {
                Console.Write($"{array[i]} ");
            }
        }

        static void Shuffle(int[] array)
        {
            Random rand = new Random();
            for (int i = array.Length - 1; i >= 1; i--)
            {
                int j = rand.Next(0, array.Length);

                int temp = array[j];
                array[j] = array[i];
                array[i] = temp;
            }
        }

        static void DrawMenu(int surnameSearch, string[] items)
        {
            Console.SetCursorPosition(0, 0);
            for (int i = 0; i < items.Length; i++)
            {
                if (i == surnameSearch)
                {
                    Console.BackgroundColor = ConsoleColor.Gray;
                    Console.ForegroundColor = ConsoleColor.Black;
                    Console.WriteLine(items[i]);
                }
                else
                {
                    Console.WriteLine(items[i]);
                }
                Console.ResetColor();
            }
        }

        static string GetChoise(string[] items, int menuBar)
        {
            return items[menuBar];
        }

        static void ChangeDirection(ref int menuBar, string[] items, out string selectMenuParagraph)
        {
            selectMenuParagraph = "";
            ConsoleKeyInfo key = Console.ReadKey();
            switch (key.Key)
            {
                case ConsoleKey.UpArrow:
                    if (menuBar <= 0)
                    {
                        menuBar = items.Length - 1;
                        DrawMenu(menuBar, items);
                    }
                    else
                    {
                        menuBar--;
                        DrawMenu(menuBar, items);
                    }
                    break;
                case ConsoleKey.DownArrow:
                    if (menuBar == items.Length - 1)
                    {
                        menuBar = 0;
                        DrawMenu(menuBar, items);
                    }
                    else
                    {
                        menuBar++;
                        DrawMenu(menuBar, items);
                    }
                    break;
                case ConsoleKey.Enter:
                    {
                        selectMenuParagraph = GetChoise(items, menuBar);
                    }
                    break;
            }
        }
    }
}