class Foo
        {
            public int a = 10;
        }

        // out -> more or less like ref
        // difference = we don't need to initialize the object we pass beforehand
        static void getNameSurname(out string name, out string surname)
        {
            name = Console.ReadLine();
            surname = Console.ReadLine();
        }

        // ref -> passes the reference so we modify the object itself
        static void PutAZero(ref Foo number)
        {
            number = null;
        }

        static void Run(string[] args)
        {
            Foo x = new Foo();
            PutAZero(ref x);
            //Console.WriteLine(x.a);  // Throws exception bc null

            string n, s;
            getNameSurname(out n, out s); // With ref -> need to initialize, with out -> not
            Console.WriteLine("Name: " + n);
            Console.WriteLine("Surname: " + s);

        }