using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        BaseClass baseInstance = new BaseClass();

        DerivedClass derivedInstance = new DerivedClass();

        BaseClass baseContainer = derivedInstance;

        Console.WriteLine("baseInstance foo");

        baseInstance.foo();

        Console.WriteLine();

        Console.WriteLine("derivedInstance foo");

        derivedInstance.foo();

        Console.WriteLine();

        Console.WriteLine("baseContainer foo");

        baseContainer.foo();

        Console.WriteLine();

    }

​

    public class BaseClass

    {

        public virtual void foo()

        {

            Console.WriteLine("BaseClass foo");

            Console.WriteLine("  Calling bar");

            bar();

            Console.WriteLine("  Calling baz");

            baz();

        }

​

        public virtual void bar()

        {

            Console.WriteLine("    BaseClass bar");

        }

​

        public virtual void baz()

        {

            Console.WriteLine("    BaseClass baz");

        }

    }

​

    public class DerivedClass : BaseClass

    {

        public new void foo()

        {

            Console.WriteLine("DerivedClass foo");

            Console.WriteLine("  Calling BaseClass foo");

            base.foo();

        }

​

        public override void bar()

        {

            Console.WriteLine("    DerivedClass bar");

        }

​

        public new void baz()

        {

            Console.WriteLine("    DerivedClass baz");

        }

    }

}