ABSTRACT CLASS

Abstract classes are Classes which cannot be instantiated. This means one cannot make a object of this class or in other way cannot create object by saying ClassAbs abs = new ClassAbs(); where ClassAbs is abstract class.Abstarct classes contains have one or more abstarct methods, ie method body only no implementation.

abstract class human

{

          //Abstract methods

          public  abstract void hair();

          //Concrete method

          public void display()

          {

                   System.Console.WriteLine("hello");

          }

         

         

}

class boys : human

{

          public override void hair()

          {

                   System.Console.WriteLine("Small");

          }

         

}

class girls : human

{

          public override void hair()

          {

                   System.Console.WriteLine("LONG");

          }

}

class  a

{

          public static void Main()

          {

                   boys b=new boys();

                   girls g=new girls();

                   b.hair();

                   g.hair();

                   b.display();

                   g.display();

                  

                  

                  

          }

}