ASP.NET
ASP.NET is a free, open-source web framework developed by Microsoft for building modern web applications and services. It supports multiple programming languages like C# and F#, and provides a unified model for creating web APIs, real-time applications, and dynamic websites. The framework includes features such as MVC (Model-View-Controller) architecture, Razor Pages, and Blazor for interactive client-side web apps.
Developers should learn ASP.NET when building enterprise-level web applications, RESTful APIs, or real-time services on the Microsoft stack, as it integrates seamlessly with tools like Visual Studio and Azure. It's ideal for scenarios requiring high performance, security, and scalability, such as e-commerce platforms, corporate intranets, or cloud-based microservices, due to its robust ecosystem and cross-platform capabilities via .NET Core.