C#多级继承

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Demo {
   class Son : Father {
      public void displayTwo() {
         Console.WriteLine(Son.. );
      }

      static void Main(string[] args) {
         Son s = new Son();
         s.display();
         s.displayOne();
         s.displayTwo();
         Console.Read();
      }
   }

   class Grandfather {
      public void display() {
         Console.WriteLine(Grandfather...);
      }
   }

   class Father : Grandfather {
      public void displayOne() {
         Console.WriteLine(Father...);
      }
   }
}