using System;

​

namespace RefactoringGuru.DesignPatterns.Prototype.Conceptual

{

    public class Person

    {

        public int Age;

        public DateTime BirthDate;

        public string Name;

        public IdInfo IdInfo;

​

        public Person ShallowCopy()

        {

            return (Person) this.MemberwiseClone();

        }

​

        public Person DeepCopy()

        {

            Person clone = (Person) this.MemberwiseClone();

            clone.IdInfo = new IdInfo(IdInfo.IdNumber);

            clone.Name = String.Copy(Name);

            return clone;

        }

    }

​

    public class IdInfo

    {

        public int IdNumber;

​

        public IdInfo(int idNumber)

        {

            this.IdNumber = idNumber;

        }

    }

​

    class Program

    {

        public void Main(string[] args)

        {

            Person p1 = new Person();

            p1.Age = 42;

            p1.BirthDate = Convert.ToDateTime("1977-01-01");

            p1.Name = "Jack Daniels";

            p1.IdInfo = new IdInfo(666);

​

            // Perform a shallow copy of p1 and assign it to p2.

            Person p2 = p1.ShallowCopy();

            // Make a deep copy of p1 and assign it to p3.

            Person p3 = p1.DeepCopy();

​

            // Display values of p1, p2 and p3.

            Console.WriteLine("Original values of p1, p2, p3:");

            Console.WriteLine("   p1 instance values: ");

            DisplayValues(p1);

            Console.WriteLine("   p2 instance values:");

            DisplayValues(p2);

            Console.WriteLine("   p3 instance values:");

            DisplayValues(p3);

​

            // Change the value of p1 properties and display the values of p1,

            // p2 and p3.

            p1.Age = 32;

            p1.BirthDate = Convert.ToDateTime("1900-01-01");

            p1.Name = "Frank";

            p1.IdInfo.IdNumber = 7878;

            Console.WriteLine("\nValues of p1, p2 and p3 after changes to p1:");

            Console.WriteLine("   p1 instance values: ");

            DisplayValues(p1);

            Console.WriteLine("   p2 instance values (reference values have changed):");

            DisplayValues(p2);

            Console.WriteLine("   p3 instance values (everything was kept the same):");

            DisplayValues(p3);

        }

​

        public static void DisplayValues(Person p)

        {

            Console.WriteLine("      Name: {0:s}, Age: {1:d}, BirthDate: {2:MM/dd/yy}",

                p.Name, p.Age, p.BirthDate);

            Console.WriteLine("      ID#: {0:d}", p.IdInfo.IdNumber);

        }

    }

}