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 Solution Patterns 22

3 posts found #openapi

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Backend PART 36

What's New in .NET 10: AddValidation, OpenAPI 3.1 and Server-Sent Events in ASP.NET Core

.NET 10 LTS brings AddValidation to minimal APIs, OpenAPI 3.1 and YAML, TypedResults.ServerSentEvents, System.Text.Json-based JSON Patch, dotnet run app.cs, C# 14 and breaking changes such as cookie auth 401/403.

4 Nov 2026 9 min 41

Backend PART 35

What's New in .NET 9: Built-in OpenAPI, Scalar and HybridCache in ASP.NET Core

.NET 9 drops Swashbuckle from the template: AddOpenApi/MapOpenApi, transformers, Scalar and Swagger UI, stampede-safe HybridCache, TypedResults.InternalServerError, StatusCodeSelector, C# 13 and 24-month STS support.

4 Nov 2026 9 min 38

Backend PART 26

Swagger and OpenAPI in ASP.NET Core Web API: Documentation with Swashbuckle

We add an OpenAPI document and Swagger UI to an ASP.NET Core Web API with Swashbuckle: the right package version, XML comments, documenting response types, an Authorize button for JWT, and common pitfalls with real error messages.

4 Nov 2026 10 min 40