ASP.NET - what is boxing and unboxing?

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what is boxing and unboxing?

Total Answers and Comments: 6

Last Update: October 23, 2009 Asked by: vHarish_06

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Best Rated Answer

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Submitted by: parii

Boxing is what happens when a value-type object is assigned to a reference-type variable.
Unboxing is what happens when a reference-type variable is assigned to a value-type variable.

Above answer was rated as good by the following members:
surendra_sahu786, surendrabalamali

October 15, 2007 06:32:44

Sameer P.

RE: what is boxing and unboxing?

Boxing is converting a value type to reference type

Unboxing is an explicit operation.

Eg.

In C# :

int X 1;
Object Y;
int Z;

Y X; -------------> This is BOXING
Z (int)Y; ----------------> This is UNBOXING

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October 16, 2007 07:21:58

sudhakar

RE: what is boxing and unboxing?

Boxing: Boxing is process of converting valueType variable to Referance Type veriable at runtime.
Unboxing: Unboxing is a process of converting referance type to value type variable at run time.

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November 16, 2007 05:48:10

Gavaskar.s

RE: what is boxing and unboxing?

Boxing: An value type will be convertered into object type.

Unboxing: Object type will be convertered into value type.

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December 10, 2007 02:10:46

parii

Member Since: December 2007 Contribution: 30

RE: what is boxing and unboxing?

Boxing is what happens when a value-type object is assigned to a reference-type variable.
Unboxing is what happens when a reference-type variable is assigned to a value-type variable.

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2 0

Overall Rating: +2

January 16, 2008 15:04:11

arshad236

Member Since: January 2008 Contribution: 1

RE: what is boxing and unboxing?

Boxing is a process of converting value type into reference type while unboxing is vice versa

What happened in backend.

Value type is stored in Stacks
Reference type is stored in Heap

So boxing.

Values shifted Stacks to Heap and vice versa.

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October 23, 2009 02:11:04

kirangiet

Member Since: June 2009 Contribution: 24

RE: what is boxing and unboxing?

Boxing: Converting Value Type into Reference Type

Example:

int i 10;

string str Convert.ToString(i);

Unboxing: Converting Reference Type into Value Type

Example:

string str "10";

int i Convert.ToInt16(str) ;

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