4.6

using System;

namespace _4._6
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] integers = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
            int[] numbers = { 1, 1, 1, 1, 1, 1 };
            writeArray(ref integers);
            Console.WriteLine();
            add(ref integers, 11);
            writeArray(ref integers);
            Console.WriteLine();
            remove(ref integers, 9);
            writeArray(ref integers);
            Console.WriteLine();
            transfer(ref integers, ref numbers);
            writeArray(ref integers);
        }

        static void add(ref int[] array, int element)
        {
            int[] newArray = new int[array.Length + 1];

            for (int i = 0; i < array.Length; i++)
            {
                newArray[i] = array[i];
            }
            newArray[array.Length] = element;
            array = newArray;
        }

        static void remove(ref int[] array, int index)
        {
            int[] newArray = new int[array.Length - 1];
            int count = 0;
            for (int i = 0; i < array.Length; i++)
            {
                if (index == i) continue;
                newArray[count] = array[i];
                count++;
            }
            array = newArray;
        }

        static void transfer(ref int[] array, ref int[] arrayForTransfer)
        {
            array = arrayForTransfer;
        }

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