using System;

​

public class Program

{

    public static void Main()

    {

        A a = new B();

        a.func1();

        a.func2();  // overriding: when 'virtual' and 'override' keywords are used respectivelly and you are able to call the drived class method from base class reference variable.

        a.func3();

    }

​

    public class A

    {

        public void func1()

        {

            Console.WriteLine("A.M1");

        }

​

        public virtual void func2()

        {

            Console.WriteLine("A.M2");

        }

​

        public virtual void func3()

        {

            Console.WriteLine("A.M3");

        }

    }

​

    public class B : A

    {

        new public void func1() // both 'new public' and 'public new' are accepted formats of Method Hiding.

        {

            Console.WriteLine("B.M1");

        }

​

        public override void func2()

        {

            Console.WriteLine("B.M2");

        }

​

        public new void func3()

        {

            Console.WriteLine("B.M3");

        }

    }

}