What is methods?

Methods are the most basic building block you can use to organize your code. Essentially,a method is a named grouping of one or more lines of code.Ideally,each method will perform a distinct,logical task.By breaking your code down into methods, you not only simplify your life,but you also make it easier to organize your code into classes and step into the world of object oriented programming.
When you declare a method in C#,the first part of the declaration specifies the data type of the return value,and the second part indicates the method name.If your method doesn't return any information,you should use the void keyword instead of a data type at the beginning of the declaration.
Here are two examples-one method that doesn't return anything and one that does:

// This method doesn't return any information.
void MyMethodNoReturnedData()
{
// Code goes here.
}

// This method returns an integer.
int MyMethodReturnsData()
{
// Return the number 10.
return 10;
}

Method Overloading?

Method overloading, which allows you to create more than one method with the same name,but with a different set of parameters. When you call the method ,the CLR automatically choose the correct version by examining the parameters you supply.
This technique allows you to collect different versions of several methods together. For example, you might allow a database search that returns an array of Product object representing records in the database.Rather than create three methods with different names depending on the criteria,suchasGetProducts(),
GetProductsInCategory(),and GetActiveProducts(),you could create three versions of the GetProducts() methods. Each method would have the same name but a different signature ,meaning it would require different parameters.This example provides two overloaded versions for the GetProductPrice() method:

private decimal GetProductPrice(int ID)
{
// Code here
}
private decimal GetProductPrice(string name)
{
// Code here
}

What is document object?

The document object is the most important information source for most Javascript program , and information about many aspects of the HTML document are represented by the properties found here. It allows you to update a document, which is being displayed and to access the components available in the loaded document.
The document object has several properties. For example the write() method, which you have learn in the earlier section is very useful, and allows the program to generate HTML that will be inserted in the document when it is displayed. Various properties are given below:

• forms[] :- An array of form objects, one for each
  and
  in the document. The number of forms in the document can be determine using the statement form.length.
• images[] :- An array of image objects,one for each embedded image. The number of images can be determine using images.length statement.
• links[] :- An array of link objects, one for each hypertext link in the document. The number of link objects can be determine using links.length statement.
  

What is Class Library?

• A class library is the loaded into the application domain that use it.
• When application use a class library that class library is a loaded into a application. e.g. If a application use a class library A and class library B is use into class library A then both A and B are loaded into the application.
  

What is namespace?

Namespace in the .NET Runtime are used to organize classes and other types into a single hierarchical structure.Namespace can also be thought of as way to specify really long names for classes and other without having to always type a full name.
Namespace are define using the namespace statement.For multiple levels of organization, namespace can be nested:
namespace Outer
{
namespace Inner
{
class MyClass
{
public static void Function(){}
}
}
}

What is the Global.asax file?

The Global.asax file, also known as the ASP.NET application file, is an optional file that contains code for responding to application-level events raised by ASP.NET.The Global.asax file is parsed and dynamically compiled by ASP.NET into a .NET Framework class the first time any resource or URL within its application namespace is activated or requested.Whenever the application is requested first time, the Global.asax file is parsed and complied to a class that extends the HttpApplication class.

What is Global.asax?

The Global.asax file(also known as the ASP.NET application file) is an optional file that is located in the application's root directory and is the ASP.NET counterpart of the Global.asax of ASP.This file exposes the application and the session level events in ASP.NET and provides a gateways to all the application and the session level events in ASP.NET.This file can be used to implement the important application and session level events such as Application_Start,Application_End, Session_Start,Session_End,etc.

What is Session?

A session is something that start the moment a user request a web page from your Web site & ends after the user levels.Each visitor to your Web site is given individual session.
Use of Session

• Session can be used to store a visitor's preferences.
• Session can also be used to create virtual shopping carts.Whenever a visitor selects an item to buy at your Web site,the item can be added to a shopping cart can be stored in a session.
• Session can be used to keep of the habits of your visitors.
  

What is Session State?

A session is define as the period of time that a unique user interacts with a Web application.Session state is a collection of object,tied to a session are stored on a server.
Session state is nothing more than memory in the shape of a dictionary or hash table,e.g. key value pairs,which can be set and read for the duration of a user's session.For example, a user selects stocks to track and the Web application can store these values in the user's ASP session instance:

Session("Stocks")="MSFT;VRSN;GE"

What is Validation Controls?

Validation controls are controls which help us to perform different validation on the data in controls like Textbox,Listbox and radiobutton.The common validation controls we use in a webform are:

• RequiredFieldValidator Control :- For compulsory required fields
• RegularExpressionValidator Control :- For Validating expressions
• CompareValidator Control :- For Comparing values
• RangeValidator Control :- For checking for a range of values
• ValidationSummary Control :- For Summarizing Validation Errors
  

How Does ASP.NET Work?

• When a browser request an HTML files, the server returns the file
• When a browser request an ASP.NET files,IIS passes the request to the ASP.NET engine on the server
• The ASP.NET engine reads the file,line by line,and execute the script in the file
• The ASP.NET file is returned to the browser as plain HTML.
  

What is different between ASP and ASP.NET?

• ASP is the run under the IIS process.
• ASP.NET is run under the IIS process(ASP.NET_pw.exe and inetinfo.exe also).
• ASP Language where available for scripting VBScript and JScript.
• ASP.NET include C# and VB.NET.
• ASP run on Microsoft Platform only.
• ASP.NET could be run on none Microsoft Platform.
• ASP engine execute server side code which is always true an interpreter(JScript,VBScript).
• ASP.NET pages are compiling to .NET classes.This classes include all of the server side code and static HTML.
  

What is master page?

A master page is a template for other pages,with shared layout and functionality.The master page define placeholders for content pages.The result page is a combination(merge) of the master page and the content page.

What is an ASP.NET File?

• An ASP.NET file is just the same as an HTML file
• An ASP.NET file can contain HTML,XML,and scripts
• Scripts in an ASP.NET file are executed on the server
• An ASP.NET file has the file extension ".aspx"
  

What is ASP.NET?

ASP.NET is a server side scripting technology that enables scripts(embedded in web pages) to be executed by an Internet server.

• ASP.NET is Microsoft Technology
• ASP.NET is a program that runs inside IIS
• IIS(Internet Information Services) is Microsoft's Internet server
• IIS comes as a free component with Windows servers
• IIS is also a part of Window 2000 and XP Professional