Chapter 1, Fundamentals of Web APIs, provides an overview of web APIs, covering their historical background and various API styles, including REST-based APIs, gRPC APIs, GraphQL APIs, and real-time APIs. It will also discuss the process of designing web APIs.

Chapter 2, Getting Started with ASP.NET Core Web APIs, explores the fundamentals of ASP.NET Core, including the project setup, dependency injection, and minimal APIs. You will also learn how to create your first web API using ASP.NET Core and how to test it using a variety of tools.

Chapter 3, ASP.NET Core Fundamentals (Part 1), covers the fundamentals of ASP.NET Core, including routing, configuration, and environments.

Chapter 4, ASP.NET Core Fundamentals (Part 2), continues the discussion of ASP.NET Core fundamentals, covering logging and middleware.

Chapter 5, Data Access in ASP.NET Core (Part 1: Entity Framework Core Fundamentals), explores the utilization of Entity Framework Core (EF Core) for database interaction. You will gain insights into implementing CRUD operations using EF Core.

Chapter 6, Data Access in ASP.NET Core (Part 2: Entity Relationships), covers the configuration of EF Core to support various model relationships, including one-to-one, one-to-many, and many-to-many.

Chapter 7, Data Access in ASP.NET Core (Part 3: Tips), provides best practices for using EF Core in your web API, such as the DbContext pooling, raw SQL queries, bulk operations, and so on.

Chapter 8, Security and Identity in ASP.NET Core, covers the security considerations surrounding web APIs. You will delve into implementing authentication and authorization mechanisms using ASP.NET Core Identity to ensure the security of your web APIs.

Chapter 9, Testing in ASP.NET Core (Part 1 – Unit Testing), explores testing methodologies and tools, including xUnit and Moq. You will learn how to implement unit tests to ensure the quality of your web APIs.

Chapter 10, Testing in ASP.NET Core (Part 2 – Integration Testing), covers integration testing using xUnit and WebApplicationFactory. You will learn how to implement integration tests to test components of your web APIs.

Chapter 11, Getting Started with gRPC, explores gRPC, a modern high-performance RPC framework that can be used to build efficient APIs. You will learn how to create gRPC services and clients using ASP.NET Core.

Chapter 12, Getting Started with GraphQL, covers GraphQL, a powerful query language for APIs. You will learn how to create GraphQL APIs using ASP.NET Core.

Chapter 13, Getting Started with SignalR, explores SignalR, a real-time communication framework for ASP.NET Core. You will learn how to create real-time APIs and clients using ASP.NET Core.

Chapter 14, CI/CD for ASP.NET Core Using Azure Pipelines and GitHub Actions, covers the process of building, testing, and deploying your web API applications using Azure DevOps and GitHub Actions. It also introduces the use of Docker to containerize your web API applications.

Chapter 15, ASP.NET Core Web API Common Practices, provides best practices for building your ASP.NET Core web API applications. It covers topics such as asynchronous programming, caching, HttpClientFactory, and so on.

Chapter 16, Error Handling, Monitoring, and Observability, covers error handling, health checks, monitoring, and observability. You will learn how to handle errors in your web APIs and how to monitor and observe your web APIs using a variety of platforms and OpenTelemetry.

Chapter 17, Cloud-Native Patterns, explores advanced architecture and patterns essential for modern web API development. You will gain insights into cloud-native design patterns, Domain-Driven-Design (DDD), Command Query Responsibility Segregation (CQRS), Retry patterns, Circuit Breaker patterns, and so on.

Chapter 18, Leveraging Open-Source Frameworks, covers various open-source frameworks that can be used to streamline development and enhance productivity, including ABP Framework, Clean Architecture, Orchard Core, eShop, and .NET Aspire.