using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        int[] array = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

        Console.WriteLine(string.Join(", ", Reverse(array)));

    }

    public static int[] Reverse(int[] a)

    {

        // implement this method.

        return a;

    }

}

​