How to use Refit to consume APIs in ASP.NET Core

"In sections below, we will implement two applications, a Contact API and a client application for consuming the Contact API. The Contact API application will comprise the following types: Contact: This represents the model class. IContactRepository: This represents the interface for the contact repository. ContactRepository: This represents the contact repository class that contains methods to return contact data. ContactsController: This represents the API controller used to expose Contact API endpoints to API clients."

"Refit is a type-safe, fast, REST library for .NET, .NET Core, and Xamarin that turns your REST API into an interface, making it easier to consume RESTful web services. Refit automatically transforms HTTP calls into C# interfaces using attributes to describe REST operations, thereby simplifying the process of connecting with APIs using minimal code. To consume APIs using Refit, you need an interface that can interact with your API."

Refit maps REST endpoints to C# interfaces, eliminating manual HTTP request creation and response parsing. Refit is open-source and supports .NET, .NET Core, and Xamarin, providing a type-safe, fast approach to consuming REST APIs. Refit uses attributes on interface methods to describe REST operations and automatically generates implementations that transform HTTP calls into interface calls. A sample implementation includes a Contact API and a Refit-based client. The Contact API defines model and repository types and exposes endpoints via a controller. The client application uses Refit to call the API and display retrieved contact records in a console.

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