Code example of the builder mode of the Design Pattern

using System;using System.Collections;using System.Collections.Generic;namespace BuilderFunc{    public class Product{        List<string> arrList = new List<string>();        // First in First Out (FIFO)         Queue  Q = new Queue();                 // Last in First out (LIFO)         Stack S = new Stack();        public void Add(string param)        {            arrList.Add(param);        }        public void AddEvent(EventArgs e)        {            Q.Enqueue(e);        }                public void Show() {             Console.WriteLine("\nProduct Param -------");             foreach (string part in arrList)                 Console.WriteLine(part);                             foreach (EventArgs e in Q)                 Console.WriteLine(e);         }    }    public abstract class AbstractBuilder{        public abstract void BuilderProductA();        public abstract void BuilderProductB();        public abstract Product GetResult();    }    public class ConcreteBuilder1 : AbstractBuilder{        private Product product = new Product();        public override void BuilderProductA(){            product.Add(this.ToString() + " : BuilderProductA");        }        public override void BuilderProductB(){            product.Add(this.ToString() + " : BuilderProductB");        }        public override Product GetResult(){            return product;        }    }    public class Director{        public static void CreateBuilder(AbstractBuilder abstractBuilder)        {            abstractBuilder.BuilderProductA();            abstractBuilder.BuilderProductB();        }    }    public class EntryPoint{        public static void Main(string[] args){            AbstractBuilder absBuilder = new ConcreteBuilder1();            Director.CreateBuilder(absBuilder);            Product p1 = absBuilder.GetResult();            p1.Show();            Console.Read();        }    }}