Book Image

Mastering Minimal APIs in ASP.NET Core

By : Andrea Tosato, Marco Minerva, Emanuele Bartolesi
Book Image

Mastering Minimal APIs in ASP.NET Core

By: Andrea Tosato, Marco Minerva, Emanuele Bartolesi

Overview of this book

The Minimal APIs feature, introduced in .NET 6, is the answer to code complexity and rising dependencies in creating even the simplest of APIs. Minimal APIs facilitate API development using compact code syntax and help you develop web APIs quickly. This practical guide explores Minimal APIs end-to-end and helps you take advantage of its features and benefits for your ASP.NET Core projects. The chapters in this book will help you speed up your development process by writing less code and maintaining fewer files using Minimal APIs. You’ll also learn how to enable Swagger for API documentation along with CORS and handle application errors. The book even promotes ideas to structure your code in a better way using the dependency injection library in .NET. Finally, you'll learn about performance and benchmarking improvements for your apps. By the end of this book, you’ll be able to fully leverage new features in .NET 6 for API development and explore how Minimal APIs are an evolution over classical web API development in ASP.NET Core.
Table of Contents (16 chapters)
Part 1: Introduction
Part 2: What’s New in .NET 6?
Part 3: Advanced Development and Microservices Concepts

Controlling serialization

As described in the previous sections, minimal APIs only provide built-in support for the JSON format. In particular, the framework uses System.Text.Json for serialization and deserialization. In controller-based APIs, we can change this default and use JSON.NET instead. This is not possible when working with minimal APIs: we can’t replace the serializer at all.

The built-in serializer uses the following options:

  • Case-insensitive property names during serialization
  • Camel case property naming policy
  • Support for quoted numbers (JSON strings for number properties)


We can find more information about the System.Text.Json namespace and all the APIs it provides at the following link:

In controller-based APIs, we can customize these settings by calling AddJsonOptions() fluently after AddControllers(). In minimal APIs, we can’t use this approach since we don&...