Real-World Web Development with .NET 9 equips you to build professional websites and services using proven technologies like ASP.NET Core MVC, Web API, and OData—trusted by organizations for delivering robust web applications. You’ll learn to design and build efficient web applications with ASP.NET Core MVC, creating well-structured, maintainable code that follows industry best practices. From there, you'll dive into Web API, mastering how to build RESTful services that are both secure and scalable. Along the way, you’ll also explore testing, authentication, containerization for deployment, ensuring that your solutions are fully production-ready. In the final part of the book, you will be introduced to Umbraco CMS, a popular content management system for .NET. By mastering this tool, you’ll learn how to empower users to manage website content independently. By the end of this book, you'll not only have a solid grasp of controller-based development but also the practical know-how to build dynamic, content-driven websites using a popular .NET CMS.