A simple dependency injection framework to demonstrate the core functionality such as registration and resolving of dependency trees.

This library is available on NuGet: https://www.nuget.org/packages/DependencyResolver.NET Use the following command to install DependencyResolver.NET using NuGet package manager console:

PM> Install-Package DependencyResolver.NET

You can use this library in any .NET project which is compatible to .NET Framework 4.5, .NET Standard 2.0 and higher.

The DependencyResolver provides two basic methods: Register and Resolve. Register allows to map abstractions to implementations at bootstrap time of an application. These registrations are sometimes also called services, service mappings or dependencies. Later, at runtime of the application, the Resolve method is used to create instances for the registered services.

// Create a new dependency injection container
var resolver = new Resolver();

// Register dependencies
resolver.Register<ILogger, ConsoleLogger>();
resolver.Register<IPaymentService, PaymentService>();
resolver.Register<IPaymentServiceConfiguration, PaymentServiceConfiguration>();

// Resolve dependencies
var paymentService = resolver.Resolve<IPaymentService>();
paymentService.Charge(99m, new MasterCard());

Do not use DependencyResolver in production code!
Use one of the well-known DI frameworks instead: Autofac, Unity, Ninject.

Original Source & Credits
http://www.pashov.net/code/dependency-injection-hood/

Autofac
https://autofac.org/

Unity Container
https://github.com/unitycontainer

Ninject
http://www.ninject.org/

Dependency Injection in ASP.NET Core
https://docs.microsoft.com/en-us/aspnet/core/fundamentals/dependency-injection?view=aspnetcore-2.2