using System;

public class Program

{

    public static void Main()

    {

        var arr = new int[] { 1, 2, 3, 5, 6, 12 };

        GetLength(arr);

        Console.WriteLine(arr[0]);

        Console.WriteLine(arr[5]);

    }

    private static int GetLength(int[] array){

        var newArray = new int[] { 7, 8, 9, 10, 11 };

        Array.Copy(newArray, array, newArray.Length);

        return array.Length;

    }

}