.NET

ASP.NET Core Web API Tutorial

Build production Web APIs: controllers, DTOs, Swagger, authentication, error handling, and integration testing—aligned with industry standards.

14 lessons 18 views All Levels Free
Start lesson 1
ASP.NET Core Web API Tutorial tutorial

Course contents

Web API Foundations

1 Introduction to REST and Web APIs 5 min 2 Create a Web API Project 5 min 3 Controllers and Action Return Types 5 min 4 Routing and API Versioning Basics 5 min 5 Swagger / OpenAPI Documentation 5 min

Data & Security

6 DTOs and AutoMapper Patterns 5 min 7 EF Core with Web API 5 min 8 JWT Authentication in Web API 5 min 9 Global Exception Handling and Problem Details 5 min 10 Pagination, Filtering, and Sorting 5 min

Production API Design

11 Idempotency and Safe Retries 5 min 12 Rate Limiting and CORS 5 min 13 Health Checks and Observability 5 min 14 Web API Interview Questions for Seniors 5 min

How this course is organized

  • Each lesson includes overview, steps, code, and interview tips
  • Use the sidebar on lesson pages to navigate
  • Content is original to Toolliyo—not copied from other sites
Begin first lesson Interview Q&A

Course quizzes

SOLID Design Principles — Practice Quiz SignalR Real-Time — Practice Quiz Microservices with .NET — Practice Quiz

Test your knowledge

Quizzes linked to this course—pass to earn certificates.

SOLID Design Principles — Practice Quiz
Test your understanding of SOLID Design Principles Tutorial. Single responsibility, open/c…
Intermediate 15 min
SignalR Real-Time — Practice Quiz
Test your understanding of SignalR Real-Time Tutorial. WebSockets, hubs, and live updates …
Intermediate 15 min
Microservices with .NET — Practice Quiz
Test your understanding of Microservices with .NET. Distributed systems, APIs, messaging, …
Intermediate 15 min
LINQ — Practice Quiz
Test your understanding of LINQ Tutorial. Query in-memory and database data with fluent LI…
Intermediate 15 min
Entity Framework Core — Practice Quiz
Test your understanding of Entity Framework Core Tutorial. Modern ORM: Code First, migrati…
Intermediate 15 min
Design Patterns in C# — Practice Quiz
Test your understanding of Design Patterns in C#. Creational, structural, and behavioral p…
Intermediate 15 min
Browse all quizzes