What is Boxing and Unboxing in .net?

Boxing:
It is a process of converting value type into Reference Type.

UnBoxing:
It is a reverse process of Boxing i.e. Converting Reference Type
into Value Type.

Here is the Example :

class Test
{
static void Main() {
int i = 123;
object o = i; //boxing
int j = (int) o; //unboxing
}
}

Diffrence between Data Reader, Dataset and Data Adapter

Difference  Angle	Data Reader	Dataset	Data Adapter
Disconnected mode	Connected mode	Disconnected mode	Disconnected mode
Forward Only	Yes	No	No
Read/Write	Read Only	Read/Write	Read/Write
Handling	Database Table	Can handle text file, XML file and Database table	Can handle text file, XML file and Database table
Storage Capacity	No storage	Temporary Storage Capacity	Temporary Storage Capacity
Accessibility	Can access one table at a time	Multiple table at a time	Multiple table at a time
Faster	Much faster than dataset	Less faster than data reader	Less faster than data reader

Useful Functions in ASP.net

1. Split Function in C#

Sample code:
string test = "afdas.;asdas.;asd";
string[] test1 = test.Split(';'); //For Character
string[] test2 = test.Split(new string[] { ".;" }, StringSplitOptions.None); //For String

Difference between ASP and ASP.net

Image Version (Click on image for enlarge version)





Text Version (See Below)

Difference Angle	ASP.Net	ASP
Generation	ASP.NET is the next generation of ASP to develop web Applications.(Latest)	After the introduction of ASP.NET, old ASP is called 'Classic ASP'.(old)
Language Support	ASP.NET supports more languages including C#, VB.NET, J# etc.	Classic ASP uses VB Script/JavaScript  for server side coding
Robustness and Reliability	ASP.net able to write much more robust and reliable programs	Not much robust and reliable
Server/HTML controls	ASP.NET offers a very rich set of controls called Server Controls and Html Controls. It is very easy to drag and drop any controls to a web form	In classic ASP, there was no server controls. You have to write all html tags manually
Code Execution	ASP.NET is compiled to efficient Microsoft Intermediate Language (MSIL) by CLR	ASP is interpreted
Database Interaction	ASP.NET uses the ADO.NET technology (which is the next generation of ADO).	Classic ASP uses a technology called ADO(ActiveX Data Objects) to connect and work with databases
File Extension	.ASPX	.ASP
OOPs	It is Object Oriented Programming, uses the event-driven model.	It is not truly Object Oriented; it uses more of a top-down programming style, where code execution begins at the top and executes down to the end
Framework Support	ASP.net Framework provides a very clean separation of code from content	ASP has Mixed HTML and coding logic
XML Support	Full XML Support for easy data exchange	No in-built support for XML.