Learn the most common dependency injection errors in ASP.NET Core, including scoped from singleton issues, unregistered services and incorrect service lifetimes.
Learn how to write xUnit tests for a class that injects services that uses ASP.NET Core dependency injection using mock and real instances.
Learn how to resolve scoped and transient services in an ASP.NET Core background service by creating a new scope and how it can also be used for multithreading.
Find out whether you should use the GetService or GetRequiredService method in the IServiceProvider type to resolve a service from ASP.NET Core dependency injection.
Learn how to add and inject keyed services into an ASP.NET Core application so you can add multiple implementations of the same services.
We'll show you how to use dependency injection to inject services into controllers, minimal APIs, Razor views and middleware in an ASP.NET Core application.
Learn the difference between singleton, scoped and transient service lifetimes in ASP.NET Core dependency injection, with examples of when to use each one.
.NET 8 brings keyed services, a dependency injection update for creating the same service with a different implementation in the IoC container.