ДЗ: Shuffle

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

namespace Shuffle
{
    class Program
    {
        static void Main(string[] args)
        {
            Random rand = new Random();
            int[] array = new int[9] { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
            Shuffle(array, rand);
            for(int i = 0; i < array.Length; i++)
            {
                Console.Write($"{array[i]} ");
            }
            Console.WriteLine();
        }

        static void Shuffle(int[] array, Random rand)
        {
            int exchVar;
            int replaceIndex;
            for(int i = 0; i < array.Length - 1; i++)
            {
                replaceIndex = rand.Next(i + 1, array.Length);
                exchVar = array[replaceIndex];
                array[replaceIndex] = array[i];
                array[i] = exchVar;
            }
        }
    }
}