using System;
namespace P6_9
{
    public class MyBaseClass : Object
    {
    }

    public class MyDerivedClass : MyBaseClass
    {
    }


    class Program
    {
        static void Main()
        {
            Object o = new Object();
            MyBaseClass  mb = new MyBaseClass ();
            MyDerivedClass  md = new MyDerivedClass ();
            Console.WriteLine(o.ToString());
            Console.WriteLine(mb.ToString());
            Console.WriteLine(md.ToString());

            Console.ReadLine();
        } 
     }
}
