Blog

Mert Özen's blog posts on software development, backend, frontend, and DevOps.

Series

.NET Core Web API 36 Angular 31 JavaScript Basics 19 JavaScript Intermediate 18 JavaScript Advanced 16 TypeScript Basics 14 TypeScript Intermediate 14 TypeScript Advanced 12 Entity Framework Core 28 Dapper 16 Git & GitHub 29 Web Security (OWASP Top 10) 21 LLM Fundamentals 20 C# Fundamentals 20 Object-Oriented Programming in C# 16 C# Collections and Generics 11 LINQ 17 Asynchronous Programming in C# 17 Advanced C# 14 C# Versions 6

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Backend PART 25

ASP.NET Core Web API Versioning: URL, Query String and Header with Asp.Versioning

To ship breaking changes without breaking old clients, we build a two-version API with Asp.Versioning.Mvc. We try URL, query string and header readers, plus deprecation and the Sunset header.

4 Nov 2026 8 min 33

Backend PART 01

What Is an ASP.NET Core Web API? HTTP and REST Fundamentals

We meet the Web API through the HTTP window: request and response anatomy, methods and idempotency, status code families and resource-oriented URLs. We also lay out the series: a .NET 6 core, then version posts.

4 Nov 2026 9 min 28