.NET

C#: Value/Reference Types, Boxing/Unboxing, async/await, Task, ValueTask

LINQ: Query Syntax, Method Syntax, Deferred Execution, IEnumerable vs IQueryable

ASP.NET Core: Program.cs, Startup, Middleware-Pipeline, Hosting Model

Controllers und Minimal APIs: Routing, Model Binding, Action Results

Dependency Injection: Serviceregistrierung, Lifetimes (Singleton, Scoped, Transient)

Entity Framework Core: DbContext, DbSet, Migrationen, Beziehungen, Lazy/Eager Loading

LINQ to Entities: Include, ThenInclude, AsNoTracking, Projections, Raw SQL

Authentifizierung: ASP.NET Core Identity, JWT-Tokens, Claims, Policies, Rollen

Autorisierung: [Authorize], Policy-Based, Resource-Based, Custom Requirements

Middleware: Built-in (UseRouting, UseAuthentication), benutzerdefinierte Middleware

Konfiguration: appsettings.json, Umgebungsvariablen, Options Pattern, IConfiguration

Fehlerbehandlung: Exception Filters, Middleware, ProblemDetails, Global Handlers

Validierung: Data Annotations, FluentValidation, Model State, Custom Validators

Testing: Unit Tests (xUnit, NUnit), Integrationstests, Mocking (Moq, NSubstitute)

SignalR: Hubs, Strongly-Typed Hubs, Groups, Verbindungslebenszyklus

Performance: Async Best Practices, Span<T>, Memory<T>, Object Pooling, Caching

API-Versionierung, Swagger/OpenAPI, Rate Limiting, Health Checks

Logging (ILogger, Serilog), Monitoring, Docker, Deployment (Azure, AWS, On-Premise)