using System;

public class Person

{

    protected string ssn = "111-222-333";

    protected string name = "John Wick";

​

    public virtual void GetInfo()

    {

        Console.WriteLine("Name: {0}", name);

        Console.WriteLine("SSN: {0}", ssn);

    }

}

public class Employee : Person

{

    public string id = "ABC123";

    public override void GetInfo()

    {

        // Calling the base class GetInfo method:

        base.GetInfo();

        Console.WriteLine("Employee ID: {0}", id);

    }

}

​

public class TestClass

{

    public static void Main()

    {

        Employee E = new Employee();

        E.GetInfo();

    }

}

​