using System;

// for a description, see: https://stackoverflow.com/a/13232372/1016343

public class Program

{

    static string[] test { get { return null;} } // property used to return null

    public static void Main()

    {

        Console.WriteLine("- case 1");

        test.Dump();                    // output: null

​

        Console.WriteLine("- case 2");

        // "elvis" operator:

        test?.Dump();                   // output: 

​

        Console.WriteLine("- case 3");

        // "elvis" operator for arrays

        test?[0].Dump();                // output: 

        Console.WriteLine("- case 4");

        (test?[0]).Dump();              // output: null

        Console.WriteLine("- case 5");

        // combined with null coalescing operator (brackets required):

        (test?[0]??"<null>").Dump();    // output: "<null>"

    }

}