using System;

using System.Collections.Generic;

​

// CHALLENGE:

// Code golf setting o.Bar to true.

// a.Bar must be set to true and the code must not throw an exception.

​

public class Program

{

    public class Foo

    {

        public bool Bar { get; set; } = false;

    }

    public static void SetBar(Foo? o)

    {

        // CHALLENGE HERE:

        //if(o!=null)o.Bar=true;

        // vs

        _=o!=null&&(o.Bar=true);

​

        // END CHALLENGE.

    }

    public static void Main()

    {

        Foo? a = new();

        Foo? b = null;

        SetBar(a);

        SetBar(b);

        Console.WriteLine(a!.Bar == true ? "SUCCESS" : "FAIL");

    }

}