Factory Method Pattern

The factory method pattern defines an interface for creating an object, but let subclasses decide which class to instantiate.

Example:

//Create the interface

    public interface iEmployee

    {

        void display(string FirstName, string LastName);

    }

    //Create the Employee Class and Implement the iEmployee Interface

    public class Employee : iEmployee

    {

        public void display(string FirstName, string LastName)

        {

            Console.WriteLine(FirstName +' '+ LastName );

        }

    }

    //Create the abstract EmployeeFactory Class.

    //Create GetEmployeeFactory method with return type of interface (iEmployee).

    public abstract class EmployeeFactory

    {

        public abstract iEmployee GetEmployeeFactory();

   

    }

    //Inherit and Implement the abstract EmployeeFactory class.

    //Override the abstract GetEmployeeFactory method.

    public class EmployeeList : EmployeeFactory

    {

        public override iEmployee GetEmployeeFactory()

        {

            return new Employee();

        }

    }

static void Main(string[] args)

        {

            EmployeeFactory obj = new EmployeeList();

            iEmployee iObj = obj.GetEmployeeFactory();

            iObj.display("Factory", "Method");

               

            Console.ReadLine();

        }

    }