Inheretece Chain

using System;

namespace TextAdventure
{

    class containerTextUtilities : Demo_ONE
    {
        public void TestBASE()
        {
            Console.WriteLine(": BASE :");
        }
    }

    class Demo_ONE : Demo_TWO
    {
        public void TestONE()
        {
            Console.WriteLine("     : TestONE :");
        }
    }

    class Demo_TWO
    {
        public void TestTWO()
        {
            Console.WriteLine("     : TestTWO :");
        }
    }

    class TextAdventure
    {
        static void Main(string[] args)
        {
            containerTextUtilities TextUtilities = new containerTextUtilities();

            TextUtilities.TestBASE();
            TextUtilities.TestONE();
            TextUtilities.TestTWO();


            Console.ReadLine();
        }
    }
}