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N-tier application architecture provides a model for developers to create a flexible and reusable application by breaking up an application into tier.

Here, I have made a Login Form using ASP.Net, which includes use of GridView, RequiredFieldValidator, RegularExpressionValidator and JavaScript for the client-side validation. This Program contains validation like OnlyNumeric Values in Textbox,

JQuery is a light weight JavaScript library which that simplifies the way of HTML DOM traversing and manipulation, event handling, client side animations, etc.

When Windows developers need a unique value, they often utilize a Globally Unique Identifier (GUID). Microsoft uses the term GUID for a unique number that identifies an entity.


The ModalPopup extender allows a page to display content to the user in a "modal" manner which prevents the user from interacting with the rest of the page.


Cookie is a small text file sent by web server and saved by web browser on client machine. Cookies are created when a user's browser loads a particular website. The website sends information to the browser which then creates a text file.

Windows service is a long-running executable that performs specific functions and it is designed not to require user intervention.

A web service allows a site to expose programmatic functionality via the Internet. Web services can accept messages and optionally return replies to those messages.

Following steps will show you to create a WCF Service and access them thorough the Client Application.


ASP.NET Session state provides a place to store values that will persist across page requests. Values stored in Session are stored on the server and will remain in memory until they are explicitly removed or until the Session expires.

We use QueryString property of Request Object for passing variables content between pages ASP.NET. QueryStrings are data that is appended to the end of a page URL.