using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

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

        test = null;

        var test2 = testFunc(test) == null;

        Console.WriteLine(test2);

    }

    private static int[] testFunc(int[] test) {

        return test?.Select(x => x).ToArray();

    }

}