Virtual Methods

Virtual Methods are the methods of the Base class which can be overridden by the Derived class.

    public class Person

    {

        public virtual void isOnPayroll()

        {

        // Logic to Check is the person is on payroll or not.

            Console.WriteLine("In Person Class");

        }

    }

    public class Employee : Person

    {

        public override void isOnPayroll()

        {

            // The method is overriden in the child class.

            // The Employee class can override the isOnPayroll or it can make it virtual for further derived class.

            Console.WriteLine("In Employee Class");

        }

    }

    class Program

    {

        static void Main(string[] args)

        {

            Person person1 = new Person();

            person1.isOnPayroll(); // In Person Class because the object is of person.

            Employee emp = new Employee();

            emp.isOnPayroll();      // In Employee Class overridden method is called.

            Person refobj = new Employee();

            refobj.isOnPayroll();  // In Employee Class. Reference of person class is used and object of Employee

                                    // is created.

            Console.Read();

        }

    }