using System;

using System.Collections.Generic;

​

namespace Sandbox

{

    public class Program

    {

        public static void Main()

        {

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

            var arr2 = new int[]{4,5,6};

            NumberList(arr, arr2);

        }

​

        public static void NumberList(params int[][] arrays)

        {

            foreach (var array in arrays)

                NumberList(array);

        }

​

        public static void NumberList(params int[] numbers)

        {

            foreach (int list in numbers)

            {

                Console.WriteLine(list);

            }

        }

    }

}