Question 1

Autofac vs built-in Microsoft DI in .NET Core - which should I use?

Accepted Answer

Use Autofac if you need advanced features like interception, multitenancy, or more control over lifetime scopes. For basic dependency injection in straightforward apps, Microsoft's built-in DI is simpler and integrates natively with less setup.

Question 2

How to set up Autofac with ASP.NET Core 6?

Accepted Answer

Install the Autofac.Extensions.DependencyInjection package, then in Program.cs, call UseServiceProviderFactory with AutofacServiceProviderFactory. Configure your ContainerBuilder in the startup logic to register services, as outlined in the integration documentation.

Question 3

What are lifetime scopes in Autofac and why are they important?

Accepted Answer

Lifetime scopes control object disposal and reuse, such as singleton or per-request instances. They are crucial for managing resources in web apps; for example, nested scopes can isolate dependencies per HTTP request to prevent memory leaks.

Question 4

Can I use Autofac with Blazor applications?

Accepted Answer

Yes, but it requires additional setup via integration packages. While Autofac supports Blazor, the configuration might be less straightforward than with server-side frameworks like MVC, so check the official docs for specific guidance.

Question 5

How does Autofac handle circular dependencies?

Accepted Answer

Autofac can detect circular dependencies and supports patterns like property injection to resolve them, but it's generally recommended to refactor code to avoid circles for better maintainability and performance.

Question 6

Is Autofac suitable for high-performance applications?

Accepted Answer

Autofac is optimized but introduces some overhead due to its feature-rich nature. For high-traffic apps, profile carefully, as extensive use of interception or complex scopes can impact startup time and memory usage.

Autofac

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