using System;

​

public class Program

{

    public class Base

    {

        public string Name { get; set; }

        public string VarName { get; set; }

        public override bool Equals(object o)

        {

            Console.WriteLine("In Base");

            return true;

        }

    }

    public class Derived : Base

    {

        public int Age { get; set; }

        public override bool Equals(object o)

        {

            base.Equals(o);

            Console.WriteLine("In derived");

            return true;

        }

    }

    public static void Main()

    {

​

        Base d1 = new Derived { Name = "anna", Age = 21, VarName = "d1" };

        Base d2 = new Derived { Name = "anna", Age = 12, VarName = "d2" };

        d1.Equals(d2);

    }

}