Question 1

How do I use Scrutor to add logging decorators to my services?

Accepted Answer

Use the Decorate method on IServiceCollection to wrap existing services with logging decorators. For example, after registering a service, call collection.Decorate<IService, LoggingDecorator>() to inject logging logic without modifying the original implementation.

Question 2

Scrutor vs Autofac: which is better for dependency injection?

Accepted Answer

Scrutor is best if you're committed to Microsoft's DI container and need lightweight scanning and decoration. Autofac offers more advanced features like module systems and property injection, but requires switching containers entirely.

Question 3

Can Scrutor work with .NET 8 and Blazor applications?

Accepted Answer

Yes, Scrutor is compatible with .NET 8 and Blazor, as it builds on Microsoft.Extensions.DependencyInjection. Use it in Program.cs to scan assemblies or decorate services, just like in other ASP.NET Core projects.

Question 4

How to exclude certain namespaces from Scrutor scanning?

Accepted Answer

Use the AddClasses method with filters like .InNamespaces() to include only specific namespaces, or chain .Where() clauses to exclude types. The README shows examples of filtering by namespace and attributes for precise control.

Question 5

Is Scrutor thread-safe during service registration?

Accepted Answer

Scrutor's extension methods on IServiceCollection are designed to be used during application startup, where thread safety isn't typically a concern. However, avoid concurrent modifications to the service collection to prevent issues.

Question 6

What happens if I decorate a service multiple times with Scrutor?

Accepted Answer

Decorations are applied in the order they are registered, creating a chain of decorators. For instance, in the example, OtherDecorator wraps Decorator wraps Decorated, allowing layered cross-cutting concerns.

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