ASP.NET Introduction

ASP.NET introduces a revolutionary and entirely new object-oriented execution model, representing a significant leap forward from its predecessor, ASP (Active Server Pages). Developed by Microsoft, ASP.NET was created to overcome the limitations of ASP and provide a more advanced and feature-rich web development technology.

ASP.NET is not merely an incremental upgrade of ASP; rather, it represents a comprehensive and distinct technology in its own right. Utilizing the maturity and power of programming languages such as VB.NET and C#, ASP.NET offers a wide array of capabilities for developing dynamic web applications.

Common Language Runtime (CLR)

One of the major improvements in ASP.NET is that it depends first of all on the Common Language Runtime (CLR), which is an important part of the full .NET framework. For example, the CLR enable programmers to code ASP using any .NET languages as well, including VB.NET and C#. This virtue is because it means that programmers are able to choose which language they are most familiar with and which one suits best their needs.

In contrast to the ASP runtime environment, ASP.NET utilizes the full capabilities of the Common Language Runtime provided by the .NET Framework. This integration with the runtime environment enables ASP.NET to utilize features such as memory management, security, and exception handling, ensuring efficient and reliable execution of web applications.

Visual Studio .NET

ASP.NET is seamlessly integrated with Visual Studio .NET, a powerful development environment that provides a rich set of tools for web application development. Visual Studio .NET offers a graphical user interface (GUI) designer, an extensive toolbox of pre-built controls, and a comprehensive debugger, streamlining the development process.

In ASP.NET, the structure of web pages is divided into two files: the .aspx file, where HTML code is written, and the code-behind file (.aspx.vb or .aspx.cs), where the programming logic resides. This separation of concerns promotes a clean and organized approach to web application development, enhancing maintainability and code readability.

HTML controls and Web controls

ASP.NET introduces two sets of controls: HTML controls and Web controls, collectively known as "server controls." These controls provide a rich set of functionalities and enable developers to create dynamic and interactive web pages effortlessly.


ASP.NET brings about a paradigm shift in web development with its object-oriented execution model and expanded capabilities. By utilizing the power of the .NET Framework, mature programming languages, and integrated development tools, ASP.NET empowers developers to create sophisticated and feature-rich web applications with ease.