Template Method Pattern

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Definition

Define the skeleton of an algorithm in an operation, deferring some steps to subclasses. Template Method lets subclasses redefine certain steps of an algorithm without changing the algorithm's structure.

abstract class AbstractClass

    {

        public abstract void PrimitiveOperation1();

        public abstract void PrimitiveOperation2();

        public void TemplateMethod()

        {

            PrimitiveOperation1();

            PrimitiveOperation2();

            Console.WriteLine("Call Template Method");

        }

    }

    //Concrete Class A

    class ConcreteClassA : AbstractClass

    {

        public override void PrimitiveOperation1()

        {

            Console.WriteLine("concreate A primi 1");

        }

        public override void PrimitiveOperation2()

        {

            Console.WriteLine("concreate A primi 2");

        }

    }

    //Concrete Class B

    class ConcreteClassB : AbstractClass

    {

        public override void PrimitiveOperation1()

        {

            Console.WriteLine("concreate B primi 1");

        }

        public override void PrimitiveOperation2()

        {

            Console.WriteLine("concreate B primi 2");

        }

    }

//calling…

            //Template Method

            AbstractClass a = new ConcreteClassA();

            a.TemplateMethod();

            AbstractClass b = new ConcreteClassB();

            b.TemplateMethod();