
.Net API

This 40-hour course is designed to help you learn how to build powerful and secure APIs using the latest versions of .NET — .NET 8 or .NET 9. Whether you’re a student, fresher, or working professional, this course will guide you step-by-step in a simple and practical way.
You will learn how to:
- Understand the basics of .NET and REST APIs
- Create real-time web APIs using .NET 8 / .NET 9
- Work with databases using Entity Framework Core
- Secure your API with authentication and authorization
- Connect your API with frontend applications
- Handle errors and logging properly
- Use tools like Postman and Swagger for testing
By the end of this course, you’ll be able to build your own backend systems for web and mobile apps. It’s perfect for those who want to become backend developers or full stack developers.
Duration: 40 Hours
Mode: Online / Offline (as per your convenience)
Prerequisites: Basic knowledge of C# or programming is helpful but not mandatory.
Join Divine Tech Skills and take the first step toward your career in backend development with the latest .NET technology!
Introduction to .NET 8 API Development
Session 1: (1 hours)
Introduction to .NET 8 API Development
- Overview of .NET 8
- Introduction to ASP.NET Core for Web APIs
- Setting up the development environment
- Installing Visual Studio or Visual Studio Code
- Installing .NET SDK
- Project structure of a .NET Web API
- Differences between REST, SOAP, and GraphQL
Basics of RESTful API Design
Session 2: (1 hours)
Basics of RESTful API Design
- Principles of REST (Representational State Transfer)
- HTTP Methods: GET, POST, PUT, DELETE, PATCH
- Status Codes and their usage (200, 404, 500, etc.)
- Understanding Routes, Controllers, and Actions
- Query parameters vs. Path parametersC# Features
- Practical demonstration
Setting Up the .NET 8 Web API Project
Session 3: (1 hours)
Setting Up the .NET 8 Web API Project
- Creating a new API project using CLI and Visual Studio
- Create Web API using Visual Studio 2022
- Project structure of a Web API (Controllers, Models, Startup)
- Configuring the Program.cs file in .NET 8
- Dependency Injection in .NET 8
- Program for Dependency Injection
- Introduction to Middleware
- Creating API using without database
- Practical demonstration
Models and Data Binding
Session 4: (2 hours)
Models and Data Binding
- Introduction to Models and DTOs (Data Transfer Objects)
- Model Validation
- Working with JSON data in requests and responses
- Binding complex objects
- Using [FromBody], [FromQuery], [FromRoute], and [FromHeader] attributes
- Practical demonstration
Building the API Endpoints
Session 5: (2 hours)
Building the API Endpoints
- Creating Controllers
- Adding Actions (GET, POST, PUT, DELETE)
- Action Filters and Result Types (e.g., ActionResult)
- Route parameters and custom routing
- Query String Parameters and pagination
Dependency Injection (DI) and Services
Session 6: (2 hours)
Dependency Injection (DI) and Services
- Introduction to Dependency Injection in .NET 8
- Creating and injecting services (Singleton, Scoped, Transient)
- Service Lifetime Management
- Configuration from appsettings.json
- Using app settings and environment variables
Database Integration (Entity Framework Core)
Session 7: (2 hours)
Database Integration (Entity Framework Core)
- Setting up Entity Framework Core in a .NET 8 API
- Creating Models and DBContext
- Database Migrations
- CRUD operations using EF Core
- Data Seeding
- Using SQL Server for development
Creating API using Code First Approach and Database First Approach and Fluent API and Fluent Model
Session 8: (5 hours)
Creating API using Code First Approach and Database First Approach and Fluent API and Fluent Model
- Customer Service
- Employee Service
- Category Service
- Product Service
- Vehicle Service
Creating API using AutoMapper and DTOs
Session 9: (3 hours)
Creating API using AutoMapper and DTOs
- Understanding AutoMapper
- Understanding DTOs
- Practical demonstration using AutoMapper and DTOs
- Creating .Net 8 API using Onion Architecture using code and database First Approach
Creating API using Onion Architecture
Session 10: (4 hours)
Creating API using Onion Architecture
- Creating .Net 8 API using Onion Architecture using code and database First Approach
Creating API using Unit of Work
Session 11: (4 hours)
Creating API using Unit of Work
- Creating .Net 8 API using Unit of Work using code and database First Approach
Authentication and Authorization
Session 12: (4 hours)
Authentication and Authorization
- Introduction to Authentication and Authorization in Web APIs
- JWT (JSON Web Token) Authentication
- Protecting Routes with [Authorize] attribute
Global Exception Handling and Logging
Session 13: (3 hours)
Global Exception Handling and Logging
- Centralized Exception Handling using Middleware
- Using try-catch blocks and global exception filters
- Logging with built-in logging providers
- Customizing log levels and output format
- Using external logging tools (Serilog, NLog)
Testing the API and Project Implementation
Session 14: (6 hours)
Testing the API and Project Implementation
- Unit Testing API Controllers
- Using Postman or Swagger for manual API testing
Duration: 40 hours
- Learn the basics of what APIs are and how they work in the .NET environment.
- Get hands-on experience by building real-world RESTful APIs using ASP.NET Core.
- Understand how to use routing and controllers to handle requests and responses in your applications.
- Learn how to connect your APIs to databases using Entity Framework Core for smooth data handling.
- Discover how to make your APIs secure with authentication and authorization using JWT and role-based access.
- Create professional and user-friendly API documentation using Swagger (OpenAPI).
- Understand how to manage different versions of your API and perform testing to make sure everything works well.
- Learn how to deploy your APIs to cloud platforms like Microsoft Azure or IIS.
- Work on real-time projects and case studies that are used in actual businesses.
- This course is great for software developers, backend engineers, and IT professionals who want to grow their skills in .NET development.