Deep Copy in C#
c#
Solution
In the example that you specified, the values of Age and Name would be zero/blank.
This is due to the fact that you instantiate the Person object, but never set the values of these fields.
From Object.MemberwiseClone Method
The MemberwiseClone method creates a shallow copy by creating a new object, and then copying the nonstatic fields of the current object to the new object. If a field is a value type, a bit-by-bit copy of the field is performed. If a field is a reference type, the reference is copied but the referred object is not; therefore, the original object and its clone refer to the same object.
So as you can see, using the MemberwiseClone method, your Age/Name fields will also be copied/cloned.
Problem
MSDN gives this example of a deep copy (http://msdn.microsoft.com/en-us/library/system.object.memberwiseclone.aspx) ``` public class Person { public int Age; public string Name; public IdInfo IdInfo; public Person ShallowCopy() { return (Person)this.MemberwiseClone(); } public Person DeepCopy() { Person other = (Person) this.MemberwiseClone(); other.IdInfo = new IdInfo(this.IdInfo.IdNumber); return other; } } ``` But, doesn't a new Person object have to be instantiated, and then returned? For example, is this code below acceptable/equal/inferior to the code above for performing a deep copy? As I understand the MemberwiseClone() method, it just performs a shallow copy, i.e. copies values/references from copied object to new object. This results in a shallow copy since the memory references are equal, i.e. the references point to the same objects. ``` public class Person { public int Age; public string Name; public IdInfo IdInfo; public Person ShallowCopy() { return (Person)this.MemberwiseClone(); } public Person DeepCopy() { Person other = new Person(); // difference other.IdInfo = new IdInfo(this.IdInfo.IdNumber); return other; } } ```