Chapter 1: Introduction and Environment Setup for ASP.NET Core Web API

1. What is a Web API?

2. Why Use ASP.NET Core for Web APIs?

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What is a Web API?

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A Web API (Application Programming Interface) is a set of endpoints exposed over the web that allow clients (like web apps, mobile apps, or other services) to interact with data or functionality. Different API Styles REST (Representational State Transfer) Uses HTTP methods (GET, POST, PUT, DELETE). Data is usually returned in JSON or XML . Example: GET /api/products Best for: Simple, stateless CRUD operations. SOAP (Simple Object Access Protocol) Uses XML-based messaging. Strict standards, more secure for enterprise needs. Example request: <soapenv:Envelope>     <soapenv:Body>         <getProductDetails>             <productId>123</productId>         </getProductDetails>     </soapenv:Body> </soapenv:Envelope> GraphQL Allows clients to request exactly the data they need. Single endpoint for all queries/mutations. E...
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Why Use ASP.NET Core for Web APIs?

 ASP.NET Core offers: Cross-platform support (Windows, Linux, macOS). High performance (among the fastest web frameworks). Dependency Injection built-in . Unified MVC & API development model . Security (Authentication, Authorization, Data Protection). Integrated Swagger support for API documentation. Common Use Cases: E-commerce backend APIs. Mobile app data services. Microservices communication. Real-time services with SignalR.
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