/// <summary>
        /// Entry point into console application.
        /// </summary>
        private static void Main()
        {
            // Non-adapted chemical compound
              Compound unknown = new Compound("Unknown");
              unknown.Display();

              // Adapted chemical compounds
              Compound water = new RichCompound("Water");
              water.Display();

              Compound benzene = new RichCompound("Benzene");
              benzene.Display();

              Compound ethanol = new RichCompound("Ethanol");
              ethanol.Display();

              // Wait for user
              Console.ReadKey();
        }