ASP.NET is an open-source, server-side web-application framework designed for web development to produce dynamic web pages. It was developed by Microsoft to allow programmers to build dynamic web sites, applications and services.
Advantages
.NET framework provides a consistent, object-oriented programming environment.
promotes safe execution of code
Eliminates the performance problems of scripted or interpreted environments.
minimizes software deployment and versioning conflicts.
consistent experience for both developers and users across various types of Windows-based and Web-based application on multiple devices
Communication built on the industry standards to ensure that code based on the .NET Framework can integrate with any other code.