Factory

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using System;
namespace Factory
{

    public interface IFactory
    {
        void Demage(int dmg);
    }

    public class EnemyType1 : IFactory
    {
        int _health=100;
        public void Demage(int dmg)
        {
            _health -= dmg;
            Console.WriteLine("EnemyType1 health: " + _health.ToString());
        }
    }

    public class EnemyType2 : IFactory
    {
        int _health = 200;
        public void Demage(int dmg)
        {
            _health -= dmg;
            Console.WriteLine("EnemyType2 health: " + _health.ToString());
        }
    }

    public abstract class EnemyFactory
    {
        public abstract IFactory InstantiateEnemy(int type);

    }

    public class InstantiateEnemyFactory : EnemyFactory
    {

        public override IFactory InstantiateEnemy(int type)
        {
            switch (type)
            {
                case 1:
                    return new EnemyType1();
                case 2:
                    return new EnemyType2();
                default:
                    throw new ApplicationException(string.Format("Wrong number"));
            }
        }

    }


    class Program
    {
        static void Main(string[] args)
        {

            int type = new Random().Next(1, 1000) % 2+1;

            EnemyFactory factory = new InstantiateEnemyFactory();

            IFactory newEnemy= factory.InstantiateEnemy(type);
            newEnemy.Demage(20);

            type = new Random().Next(1, 2000)%2+1;

            IFactory newEnemy2 = factory.InstantiateEnemy(type);
            newEnemy2.Demage(20);

            Console.ReadKey();

        }
    }
}