Example of Polymorphism in .Net

What is Polymorphism?Polymorphism means same operation may behave differently on different classes.
Example of Compile Time Polymorphism: Method Overloading
Example of Run Time Polymorphism: Method Overriding

Example of Compile Time Polymorphism
Method Overloading- Method with same name but with different arguments is called method overloading.
- Method Overloading forms compile-time polymorphism.

Practical example of Method Overloading (Compile Time Polymorphism)

using System;

namespace method_overloading

{

    class Program

    {

        public class Print

        {

           

            public void display(string name)

            {

                Console.WriteLine("Your name is : " + name);

            }

            public void display(int age, float marks)

            {

                Console.WriteLine("Your age is : " + age);

                Console.WriteLine("Your marks are :" + marks);

            }

        }

       

        static void Main(string[] args)

        {

            Print obj = new Print();

            obj.display("George");

            obj.display(34, 76.50f);

            Console.ReadLine();

        }

    }

}

Example of Run Time Polymorphism
Method Overriding- Method overriding occurs when child class declares a method that has the same type arguments as a method declared by one of its superclass.
- Method overriding forms Run-time polymorphism.
- Note: By default functions are not virtual in C# and so you need to write “virtual” explicitly. While by default in Java each function are virtual.
- Example of Method Overriding:
Class parent
{
virtual void hello()
{ Console.WriteLine(“Hello from Parent”); }
}

Class child : parent
{
override void hello()
{ Console.WriteLine(“Hello from Child”); }
}

static void main()
{
parent objParent = new child();
objParent.hello();
}
//Output
Hello from Child.