using System;

public class Program

{

    public static int[] Array;

    public static void Main()

    {

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

        Program.Assign(arr);

        arr[0] = 4;

        Console.WriteLine(string.Join(",", Program.Array));

    }

    public static void Assign(params int[] array)

    {

        Program.Array = array;

    }

}