建造者模式

class Program
    {
        static void Main(string[] args)
        {
            Director director = new Director();
            Builder builder = new DellWorker();
            director.CreateComputer(builder);
            Computer computer = builder.GetComputer();
            computer.Show();
        }
    }
    class Computer
    {
        List<string> computerCom =new List<string>(); 
        public void Add(string com)
        {
            computerCom.Add(com);
        }
        public void Show()
        {
            foreach(var item in computerCom)
            {
                Console.WriteLine("Build : "+ item);
            }
        }
    }
    abstract class Builder
    {
        protected Computer computer = new Computer();
        public abstract void AddCPU();
        public abstract void AddGPU();
        public abstract void AddRAM();
        public abstract Computer GetComputer();
    }
    class DellWorker : Builder
    {
        public override void AddCPU()
        {
            computer.Add("INTELCPU");
        }

        public override void AddGPU()
        {
            computer.Add("NAVIDGPU");
        }

        public override void AddRAM()
        {
            computer.Add("CRAM");
        }

        public override Computer GetComputer()
        {
            return computer;
        }
    }
    class Director
    {
        
        public void CreateComputer(Builder builder)
        {
            builder.AddCPU();
            builder.AddGPU();
            builder.AddRAM();
        }
    }