C#访问修饰符

using System;
namespace MySpecifiers
{
   class Demo
   {
      protected string name = Website;
      protected void Display(string str)
      {
         Console.WriteLine(Tabs:  + str);
      }
   }
   class Test : Demo
   {
      static void Main(string[] args)
      {
         Test t = new Test();
         Console.WriteLine(Details:  + t.name);
         t.Display(Product);
         t.Display(Services);
         t.Display(Tools);
         t.Display(Plugins);
      }
   }
}