Answer / kautilya

Boxing is to implicitly converting value type to refrence
type,

int x = 10;
double y = x;


Unboxing is to explicitly converting refrence type to value
type

double y = 10.234;
int x = (int)y;

Answer / lakshmi

The conversion of the value type to reference type is known
as Boxing and converting reference type back to value type
is known as Unboxing.

Answer / kumaresh

BOXING: Converting value type to referenc type.
Here we go with an example,

ArrayList instance = new ArrayList()
//In the above line of code,ArrayList is a reference
type.Add some items to the arraylist. For example,

instance.Add(1);
instance.Add(100);
instance.Add(3);
//3 items added to the arraylist.
//Integer valuee 3 is value type.Adding 3 to the reference
type(here it's arraylist) is boxing.
i.e., Converting value type to referenc type.

UNBOXING:Converting Reference type to value type.
Below is an example, retrives the items from the
arraylist.

foreach (int item in arrayList)
Console.WriteLine(item);

Here arraylist(referenec type) will have 3 values in the
list, which we added above.
Adding this arraylist items to an int variable[here int
variable is "item"] is unboxing.
i.e.,converting the reference type to value type.

Hope you would have understood.
Thanks

Answer / eduardo belmonte

Boxing is the process of converting value type to reference
type.

Unboxing is the process of converting from a reference type
to a value type.

Both are slow and should be avoided when possible or
unneeded.

Dim st AS String
Dim obj As Object
Dim n As Integer = 5
st = n ' Boxing happens
obj = n ' Boxing happens

n = st ' Unboxing happens
n = obj ' Unboxing happens

Answer / amit

The conversion of the value type to reference type is known
as Boxing and converting reference type back to value type
is known as Unboxing.

Answer / uma

Boxing means converting value type to refrence type and un
boxing means converting refrence type to value type

Answer / karthik

Boxing:Focing an value type into referencetype is known as boxing.
EX:int a=10;
object obj;
obj=a;
Unboxng:forcing an reference type into value type is known as unboxing.
EX:
int b:
b=(int)obj;
unboxing should be done explicitly using datatype casting.

what do machine key element in configuration file specify?

1 Answers   TCS,

How do you change the session time-out value?

0 Answers   TryTechnicals Pvt Ltd,

What do you mean by authentication and authorization

3 Answers  

What is the purpose of url encoding?

0 Answers  

How do you secure your connection string information?

0 Answers  

web farm .. how does session shuld be stored... if inproc used? does the session persists from one server to other.

2 Answers   TCS,

what are the ways to improve performance in .net application?

7 Answers   Mind Tree,

Tell about WebService in Asp.Net?

5 Answers   Accenture, CTS,

Explain the difference between the web config and machine config.

0 Answers  

How can we identify that the Page is Post Back?

0 Answers  

What is difference between cache and session?

0 Answers  

Explain about secure socket layer?

0 Answers