Simple Inheritance Using C#

using System;
namespace BhuvanSample {
    public class Program {
        static void Main(string[] args) {
            Parent parent = new Parent();
            parent.Teach();
            Child s = new Child();
            s.Learn();
            s.Teach();
            Console.ReadKey();
        }
        class Parent {
            public void Teach() {
                Console.WriteLine("Teach");
            }
        }
        class Child: Parent {
            public void Learn() {
                Console.WriteLine("Learn");
            }
        }
    }
}