4.7

using System;

namespace _4._7
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] integers = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

            writeArray(integers);
            Console.WriteLine();
            shuffle(ref integers);
            writeArray(integers);
        }

        static void shuffle(ref int[] array)
        {
            Random random = new Random();

            for (int i = array.Length - 1; i > 0; i--)
            {
                int randomValue = random.Next(i);
                int value = array[i];
                array[i] = array[randomValue];
                array[randomValue] = value;
            }
        }

        static void writeArray(int[] array)
        {
            for (int i = 0; i < array.Length; i++)
            {
                Console.Write(array[i] + " ");
            }
        }
    }
}