factory.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace constr_PO_laba8
{
    abstract class AbstractFactory
    {
        public abstract AbstractProductA CreateProductA();
        public abstract AbstractProductB CreateProductB();
    }
    class ConcreteFactory1 : AbstractFactory
    {
        public override AbstractProductA CreateProductA()
        {
            return new ProductA1();
        }

        public override AbstractProductB CreateProductB()
        {
            return new ProductB1();
        }
    }
    abstract class AbstractProductA
    { }

    abstract class AbstractProductB
    { }
    class ConcreteFactory2 : AbstractFactory
    {
        public override AbstractProductA CreateProductA()
        {
            return new ProductA2();
        }

        public override AbstractProductB CreateProductB()
        {
            return new ProductB2();
        }
    }


    class ProductA1 : AbstractProductA
    {
        public ProductA1()
        {
            Console.WriteLine("A1 created");
        }
    }

    class ProductB1 : AbstractProductB
    {
        public ProductB1()
        {
            Console.WriteLine("B1 created");
        }
    }

    class ProductA2 : AbstractProductA
    {
        public ProductA2()
        {
            Console.WriteLine("A2 created");
        }
    }

    class ProductB2 : AbstractProductB
    {
        public ProductB2()
        {
            Console.WriteLine("B2 created");
        }
    }

    class Client
    {
        private AbstractProductA abstractProductA;
        private AbstractProductB abstractProductB;

        public Client(AbstractFactory factory)
        {
            abstractProductA = factory.CreateProductA();
            abstractProductB = factory.CreateProductB();
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            ConcreteFactory1 factory1 = new ConcreteFactory1();
            Client client1 = new Client(factory1);
            Client client2 = new Client(factory1);

            Console.WriteLine("________________________________\n");

            ConcreteFactory2 factory2 = new ConcreteFactory2();
            Client client3 = new Client(factory2);
            Client client4 = new Client(factory2);

            Console.ReadLine();
        }
    }
}