ASP.NET Core 10 Web API Development: Build Modern REST APIs with C#, .NET 10, Minimal APIs, Validation, OpenAPI, and Real-World Projects.

Build modern ASP.NET Core 10 Web APIs with C#, .NET 10, Minimal APIs, validation, dependency injection, OpenAPI, and a practical real-world project.If you know the basics of C# and are ready to move into backend development, ASP.NET Core 10 Web API Development gives you a practical path from your first HTTP endpoint to a structured, maintainable API.Rather than teaching ASP.NET Core through disconnected examples, this book follows one evolving project: WorkBoard, a project and task management backend. You will start with the fundamentals of HTTP, JSON, REST, and Minimal APIs, then gradually add the features expected in a modern ASP.NET Core application.Along the way, you will learn how to: - Build REST-style endpoints with ASP.NET Core 10 Minimal APIs- Work with routes, query parameters, POST, PUT, PATCH, and DELETE- Design request and response models with DTOs- Use System.Text.Json and strongly typed HTTP results- Validate API input with .NET 10 built-in Minimal API validation- Return consistent errors with Problem Details- Handle unexpected exceptions globally- Use dependency injection and application services- Choose appropriate transient, scoped, and singleton lifetimes- Organize growing Minimal APIs with MapGroup and extension methods- Work with middleware, endpoint filters, configuration, and environments- Generate first-party OpenAPI documentation in ASP.NET Core 10- Add an interactive API documentation interface- Build project and task endpoints with filtering and basic searching- Structure an API so persistent database storage can be added laterThe book emphasizes clear engineering decisions rather than unnecessary architecture. You will see when to keep an endpoint simple, when logic belongs in a service, why public API contracts should remain separate from internal models, and how to keep Program.cs focused as the application grows.By the end, you will have built a complete WorkBoard API with project and task resources, validation, structured error handling, dependency injection, application services, endpoint groups, filtering, searching, and OpenAPI documentation.ASP.NET Core 10 Web API Development is written for C# developers, students, self-taught programmers, and developers moving into modern .NET backend development. No previous professional ASP.NET Core experience is required.If you want to understand not only how to make an ASP.NET Core API work, but how to structure it so it can grow, this book gives you the foundation to do it.