dotnet-csharp-dependency-injection

Advanced Microsoft.Extensions.DependencyInjection patterns for .NET applications. Covers service lifetimes, keyed services (net8.0+), decoration, factory delegates, scope validation, and hosted service registration.

Scope

• Service lifetimes (transient, scoped, singleton) and captive dependency detection
• Keyed services (.NET 8+) and factory delegates
• Decorator pattern and scope validation
• Hosted service registration

Out of scope

• Async/await patterns in BackgroundService -- see [skill:dotnet-csharp-async-patterns]
• Options pattern binding and IOptions -- see [skill:dotnet-csharp-configuration]
• SOLID/DRY design principles -- see [skill:dotnet-solid-principles]

Cross-references: [skill:dotnet-csharp-async-patterns] for BackgroundService async patterns, [skill:dotnet-csharp-configuration] for IOptions<T> binding.