using System;
namespace ConsoleApp3
{
    class BaseClass
    {
        public virtual void show()
        {
            Console.WriteLine("Base class");
        }
    }

    class DerivedClass : BaseClass
    {
        // overriding
        public override void show()
        {
            Console.WriteLine("Derived class");
        }
    }
    class SampleClass
    {
        // Main Method
        public static void Main()
        {
            BaseClass BaseClassObject = new BaseClass();

            BaseClassObject.show();

            BaseClassObject = new DerivedClass();

            BaseClassObject.show();
        }
    }
}