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

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Backend PART 11

C# IAsyncEnumerable, await foreach and Async Dispose

Collecting books from a paged API with Task<List<T>> leaves the first element until last; with an async iterator, yield return and await together let the first page flow right away. What await foreach expands to and MoveNextAsync's ValueTask, EnumeratorCancellation and CS8425, the finally that runs on break, IAsyncDisposable and await using, DeserializeAsyncEnumerable and streaming in ASP.NET Core.

7 Nov 2026 9 min 4

Database PART 10

Buffered and Unbuffered Reads in Dapper: Streaming Large Result Sets

We measure the difference between buffered and unbuffered reads in Dapper: an unbuffered result re-running the query on every enumeration, 191 MB versus near-zero memory on a million rows, IAsyncEnumerable streaming with QueryUnbufferedAsync, cancellation with WithCancellation and the disposed-connection trap, all with real output.

6 Nov 2026 9 min 9