C# tutorial OOP-class inheritance

Class inheritance

class derived_classname:access_level baseclass1, baseclase2,...{ }

access_level can be public, protected, or private

To illustrate the use of inheritance, now we create a base class called Animal and a derived class called Dog.

namespace Ctest

{

    class Program

    {

        static void Main(string[] args)

        {

           Dog dog = new Dog();//create object

           dog.setnumberOflegs(4);/*access setnumberOflegs of baseclass:Animal */

            dog.setdogName("Aluk");//access setdogName of derived class: Dog */

            int l = dog.getnumberOflegs();/*access getnumberOflegs of base class:Animal */

            string name = dog.getdogName();/*access getdogName of derived class: Dog */

            Console.WriteLine("Legs={0}",l );

            Console.WriteLine("Dog name={0}", dog.getdogName());

          }

     }

}

class Animal

    {

        protected int numberOflegs;

        public void setnumberOflegs(int n) { numberOflegs = n; }

        public int getnumberOflegs() { return numberOflegs; }

    }

    class Dog : Animal

    {

        private string dogName;

        public void setdogName(string name) { dogName = name; }

        public string getdogName() { return dogName; }

    }

Note: Class members declared with public keyword has global access. Class members declared with protected keyword can only be access within their own class and derived class. Class members declared with private keyword can only be accessed in their own class.