ASP.NET is a fully-featured web framework developed by Microsoft. It is used to build dynamic web applications, web services, and websites. ASP.NET is part of the .NET framework, which provides a comprehensive programming model for creating enterprise-level applications on Windows. ASP.NET is not the same as ASP.NET Core.
ASP.NET is based on the Common Language Runtime (CLR) and enables developers to write applications in any .NET language, such as C#, VB.NET, and F#. It enables developers to create dynamic web pages that can interact with databases, process requests, and generate dynamic output. ASP.NET also provides a server-side scripting environment that can be used to build powerful web applications.