Prototype Design Pattern in C#

Specifies the kind of objects to create using a prototypical instance, and create new objects by copying this prototype.

This structural code demonstrates the Prototype pattern in which new objects are created by copying pre-existing objects (prototypes) of the same class.

using System;

namespace DoFactory.GangOfFour.Prototype.Structural {
 
  // MainApp test application
  class MainApp
  {
 
    static void Main()
    {
      // Create two instances and clone each 
      ConcretePrototype1 p1 = new ConcretePrototype1("I");
      ConcretePrototype1 c1 = (ConcretePrototype1)p1.Clone();
      Console.WriteLine ("Cloned: {0}", c1.Id);

      ConcretePrototype2 p2 = new ConcretePrototype2("II");
      ConcretePrototype2 c2 = (ConcretePrototype2)p2.Clone();
      Console.WriteLine ("Cloned: {0}", c2.Id);

      // Wait for user 
      Console.Read();
    }
  }

  // "Prototype" 
  abstract class Prototype
  {
    private string id;

    // Constructor 
    public Prototype(string id)
    {
      this.id = id;
    }

    // Property 
    public string Id
    {
      get{ return id; }
    }

    public abstract Prototype Clone();
  }

  // "ConcretePrototype1" 
  class ConcretePrototype1 : Prototype
  {
    // Constructor 
    public ConcretePrototype1(string id) : base(id) 
    {
    }

    public override Prototype Clone()
    {
      // Shallow copy 
      return (Prototype)this.MemberwiseClone();
    }
  }

  // "ConcretePrototype2" 
  class ConcretePrototype2 : Prototype
  {
    // Constructor 
    public ConcretePrototype2(string id) : base(id) 
    {
    }

    public override Prototype Clone()
    {
      // Shallow copy 
      return (Prototype)this.MemberwiseClone();
    }
  }
}