using System;

public class Program

{

    class Foo {

        public string foo;

        public Foo(string foo) {

                this.foo = foo;

        }

    }

    class Bar : Foo {

        public string bar;

        public Bar(string foo, string bar) : base(foo) {

            this.bar = bar;

        }

    }

    public static void Main()

    {

        Foo foo = new Foo("foo");

        Bar bar = new Bar("foo for super ", " my bar");

        Foo fooBar = new Bar("foo for super", "my bar");

        Console.WriteLine(foo.foo);

        Console.WriteLine(bar.foo + bar.bar);

    }

}