Example of Inheritance

//generalization  - extracted common characteristic
class Product
    {
         int productcode;
         string productname;
         int price;
        
        protected void getData()
        {
            Console.WriteLine("Input Product Information");
            Console.WriteLine("Enter Product Code");
            productcode = int.Parse(Console.ReadLine());
            Console.WriteLine("Enter product Name");
            productname = Console.ReadLine();
            Console.WriteLine("Enter Price");
            price = int.Parse(Console.ReadLine());
        }
       protected  void showData()
        {

            Console.WriteLine("Show Product Information");
            Console.WriteLine("Product Code={0} \n Product Name={1} \n Price={2} \n", productcode, productname, price);
        }
 }//class Product Ends
   
//specialization  - to specific job + inherited product
    class Book : Product
    {
        int noPages;
        string Author;
        internal void getBook()
        {

            getData();

            Console.WriteLine("Input Book  specific Information");
            Console.WriteLine("Enter No of Pages");
            noPages = int.Parse(Console.ReadLine());
            Console.WriteLine("Enter Name of Author");
            Author = Console.ReadLine();

        }
      internal void showBook()
        {
           showData();

            Console.WriteLine("Show Book specific information");
            Console.WriteLine("Pages={0} \n Author={1}", noPages, Author);

        }
         
          
    }//Book Class Closed

//specialization  - to specific job + inherited product
    class Pen : Product
    {

    
        string b;
        string cink;

        internal void getPen()
        {
            getData();
            cink = Console.ReadLine();
            Console.WriteLine("Enter Brand Name");
            b = Console.ReadLine();

        }
        internal void showPen()
        {   showData();
            Console.WriteLine("Brand={0} \n Ink Color={1}", b,cink);

        }

    }

class CallingClass
{
     public static void Main()
      {
        Console.WriteLine("****BOOK *****"); 
        Book b=new Book();
        b.getBook();
        b.showBook();

        Console.WriteLine("****PEN *****"); 
        Pen p=new Pen();
        p.getPen();
         p.showPen();

        Console.ReadKey();
}