ASP.NET Core 9.0 API Native AOT: The Essential Guide

ASP.NET Core 9.0 with Native Ahead-of-Time (AOT) compilation is a game changer for modern .NET development. It allows developers to build high-performance, lightweight, and self-contained applications that run faster, use less memory, and are ideal for cloud, Docker, and cross-platform deployments. This course, ASP.NET Core 9.0 API Native AOT: The Essential Guide, is designed to give you step-by-step training in building and deploying real-world APIs with Native AOT.

We begin with the core fundamentals: an introduction to Native AOT, a clear comparison of JIT versus AOT for .NET developers, and guidance on setting up your development environment with .NET 9.0 SDK and Visual Studio 2022. You will then create your first ASPNET Core 9.0 Native AOT project, run and debug it, and publish native executables for Windows, Linux, and macOS, including Apple Silicon (arm64). This ensures you understand how Native AOT applications behave across platforms.

From there, we move into practical ASPNET Core API development. You will build RESTful APIs with GET, POST, PUT, and DELETE endpoints, generate OpenAPI documentation and clients using Scalar, and implement real-world features such as a calculator API and file upload/download endpoints. You will also learn how to implement dependency injection, configure appsettings.json in an AOT-friendly way, and use LINQ in ASP.NET Core 9.0 Native AOT applications.

Modern deployment is a major focus of this course. You will run your Native AOT APIs inside Docker containers, explore ORM and database access options that work with AOT, and build SQL Server CRUD APIs using ADO .NET. Finally, you will publish and run ASP.NET Core 9.0 Native AOT APIs with SQL Server on Windows and Linux, and deploy them as containers that connect to SQL Server.

This course is essential for .NET developers who want to learn ASP.NET Core 9.0 API development with Native AOT in a practical, hands-on way. The focus is on building real projects, publishing cross-platform executables, running inside Docker, and connecting to SQL Server. By the end of the course, you will have the skills to create fast, lean, and production-ready APIs using ASP.NET Core 9.0 with Native AOT for Windows, Linux, macOS, and containerized environments.