.NET Core Dependency Injection–Check if a service is already registered

It is way too hot today to write a long post, so I focus on a small but useful new feature in .NET 6.

As I mentioned before in most of my projects I'm using Autofac as the Inversion of Control container of my choice. One of the features that Autofac has to offer is the IsRegistered method which allows you to check if a specific type is already registered in the IoC container.

bool isRegistered=container.IsRegistered<IExampleInterface>>();

view raw AutofacIsRegistered.cs hosted with ❤ by GitHub

Starting from .NET 6, you can do a similar thing with the Microsoft DI container using the IServiceProviderIsService interface:

	public partial interface IServiceProviderIsService
	{
	bool IsService(Type serviceType);
	}

view raw IServiceProviderIsService.cs hosted with ❤ by GitHub

You first need to resolve the interface from the container and then you can call the IsService() method to see if the service can be resolved through the container or not:

	var serviceProviderIsService = container.GetService<IServiceProviderIsService>();
	var isRegistered=serviceProviderIsService.IsService(typeof(IExampleInterface)));

view raw MicrosoftDIIsService.cs hosted with ❤ by GitHub

That’s it! Time to cool down(literally)…