SaaS Middleware Anti-Patterns: What Not to Do in ASP.NET Core
Bad middleware doesn’t just break requests, it breaks entire tenants. Learn the anti-patterns to avoid in your ASP.NET Core SaaS architecture and how to fix them.
ASP.NET Core
ASP.NET Core gives you the best of all worlds - cross-platform flexibility, cloud-ready architecture, and the performance to handle millions of requests. Its modular design lets you include only what you need, while built-in features for security, configuration, and logging make development both faster and safer.
ASP.NET Core: Auth with Middleware or Filters?
Discover how using custom middleware for authentication in ASP.NET Core SaaS APIs leads to cleaner, faster, and more maintainable code compared to traditional authorization filters.
Why Middleware Beats DI for SaaS Extension Points
In multi-tenant SaaS applications, custom middleware gives you the earliest hook in the request pipeline, even before dependency injection kicks in. Middleware runs at the very beginning of your pipeline, providing access to raw request data before any transformations occur.
3 Signs Your Code Needs Middleware
TL;DR Repeating logic across controllers (like logging or header checks)? Move it to middleware. Modifying requests/responses in controllers? Middleware handles that cleanly and early. Your services use HttpContext? Extract that logic into middleware for cleaner, testable code. If your services are bloated or you’re duplicating logic across controllers, middleware might be the extension point you actually need. Many developers reach for filters or services first, when middleware would’ve been faster, simpler, and more maintainable. ...
Why Constructor Injection Matters in Clean Architecture
Constructor injection is your first clean architecture decision. Learn how to write testable, decoupled ASP.NET Core code using built-in DI, scoped lifetimes, and mocking techniques.
Unit & Integration Testing for ASP.NET Middleware
This guide covers how to effectively test ASP.NET Core middleware using unit tests, integration tests, and mocks. It includes examples of common middleware patterns, how to handle dependencies, and best practices for ensuring your middleware behaves correctly in production.
Dependency Inversion in C#: Flexible Code with ASP.NET Core
Discover how the Dependency Inversion Principle makes your C# code flexible and testable. Learn to use ASP.NET Core DI to depend on abstractions, swap implementations, and build maintainable, scalable applications with real-world examples.
Add & Modify HTTP Headers in ASP.NET Core Middleware
This guide explains how to add and modify HTTP headers in ASP.NET Core using custom middleware. Covers dynamic header injection, security best practices, CORS configuration, and middleware pipeline ordering for robust API responses.
Debug ASP.NET Core Middleware Execution Flow
TL;DR Middleware order in ASP.NET Core directly affects authentication, CORS, routing, and logging. Register exception handling, HTTPS redirection, and logging middleware early in the pipeline. Place CORS before authentication and routing to avoid preflight and header issues. Authentication must come before authorization and routing for secure endpoints. Use tools like MiddlewareAnalysis and custom logging middleware to debug pipeline flow. Common mistakes include routing before authentication, CORS after auth, and late exception handling. Correct middleware order prevents security holes, debugging nightmares, and production outages. The Hidden Culprit Behind Mysterious Pipeline Failures Picture this: your ASP.NET Core API works perfectly in development, but authentication randomly fails in production. CORS headers appear inconsistently. Some endpoints return 404s that should work. The logs show everything should be working correctly. ...
Correct Middleware Order in ASP.NET Core Apps
Discover the optimal middleware order for ASP.NET Core. See why each step matters, how to avoid common pitfalls, and use a proven pipeline template for secure, fast, and maintainable web APIs.