using System;

public class Program

{

    public static void Main()

    {

        HBSetup setup = new HBSetup();

        setup.WriteTest();

    }

    public class Setup

    {

        public void WriteTest()

        {

            Test();

        }

​

        public virtual void Test()

        {

            Console.WriteLine("Test from Setup.");

        }

    }

​

    public class HBSetup : Setup

    {

        public override void Test()

        {

            Console.WriteLine("Test from HB setup.");

        }

    }

}