Home Archive API scaling, package pruning, AI agents – .NET News Daily Issue #463 (May 27, 2026)

Editor's note

I put together another deliberately mixed batch today, which is exactly how I like this newsletter. The long-running API piece is practical architecture advice you can apply immediately, and the NuGet package pruning post matters because dependency hygiene and vulnerability noise affect nearly every modern .NET codebase. I also liked the HttpClient pooled connections write-up for turning a subtle production issue into a clear lesson.

API scaling, package pruning, AI agents

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Today's Articles

C# Word Library: Comparing 7 Options for .NET Developers in 2026

https://www.c-sharpcorner.com/article/c-sharp-word-library-comparing-7-options-for-net-developers-in-2026/

Explore the top 7 C# Word libraries for .NET in 2026. Compare features, licensing, and performance to choose the best option for document generation, parsing, and conversion.

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Strategy Pattern: Choosing Without Attachment

http://www.binaryintellect.net/articles/d454ecd2-5e85-4140-bd99-bf61c7216835.aspx

Every application reaches a point where it must make a choice. How should a list be sorted? How should a payment be processed? Which discount should be applied? How should a user be authenticated? The...

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You Need This Hook #vscode #hooks #customization

https://www.youtube.com/shorts/AuAvhVvpbF0

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5 Dependency Injection Anti-Patterns I See in Almost Every .NET Codebase

https://serkanozbeykurucu.medium.com/5-dependency-injection-anti-patterns-i-see-in-almost-every-net-codebase-fdc6f3056a66?source=rss------dotnet-5

very .NET developer uses DI. We register services in Program.cs,

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How to Scale Long-Running API Requests

https://www.milanjovanovic.tech/blog/how-to-scale-long-running-api-requests

When a single API call takes minutes to finish, it punishes both your users and your server. Here's the progression I walk through to turn long-running endpoints into something responsive, scalable, a...

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The New Agent Customization Window #vscode #customization

https://www.youtube.com/shorts/3kYj9mu9ssM

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Understanding IHostedService & BackgroundService in .NET 10

https://codewithmukesh.com/blog/ihostedservice-vs-backgroundservice-dotnet/

IHostedService vs BackgroundService in .NET 10. Side-by-side code, 5 production gotchas, decision matrix, and when to reach for Hangfire instead.

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The Static HttpClient That Wouldn’t Rotate: A Tale of Pooled Connections

https://blog.dotnetframework.org/2026/05/20/the-static-httpclient-that-wouldnt-rotate-a-tale-of-pooled-connections/

The symptom A production .NET service had been running fine for months. It made outbound HTTP calls through a rotating proxy provider — the kind that promises a new exit IP for each request. Then one ...

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We Built an AI Agent Platform on .NET. Then Microsoft Shipped Agent Framework 1.0.

https://medium.com/@krativarshney7/we-built-an-ai-agent-platform-on-net-then-microsoft-shipped-agent-framework-1-0-b3a778dd96d6?source=rss------dotnet-5

Six architecture mistakes from building an internal agent platform on Semantic Kernel — and the handful of decisions that meant the ground…

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C# 15 and the Future of .NET: A Comprehensive Deep Dive into Union Types and the Evolution of C# 14

https://medium.com/@s.quddin/c-15-and-the-future-of-net-a-comprehensive-deep-dive-into-union-types-and-the-evolution-of-c-14-cd842f306233?source=rss------dotnet-5

Introduction: The Next Evolution of C#

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How to run evals for the model router

https://devblogs.microsoft.com/foundry/how-to-run-evals-for-model-router/

One endpoint. Smarter spend. Model router in Foundry Models picks the optimal LLM for every prompt in real time based on signals like complexity, reasoning, and task type. Now with access to 28 fronti...

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Repository Pattern in .NET 10 - Do You Really Need It?

https://codewithmukesh.com/blog/repository-pattern-do-you-really-need-it/

I have shipped 50+ .NET APIs and most did not need a Repository Pattern. My sharp .NET 10 verdict on when to use it, when to skip it, what to use instead.

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Repository Pattern with Entity Framework Core in .NET 10 | Clean Architecture Simplified

https://medium.com/@tejaswini.nareshit/repository-pattern-with-entity-framework-core-in-net-10-clean-architecture-simplified-9ea68f8831ee?source=rss------csharp-5

Building scalable applications in .NET 10 is not only about writing APIs — it is about writing maintainable code. That is why many…

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Tracing Agent Sessions with OpenTelemetry & Aspire

https://www.youtube.com/watch?v=JsZ3q8OKsMM

In this video Maddy Montaquila demos what's going on behind the scenes with Agent Sessions with OpenTelemetry and Aspire in VS Code. https://aspire.dev/dashboard

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NuGet Package Pruning: Cleaner Dependencies and Actionable Vulnerability Reports

https://devblogs.microsoft.com/dotnet/nuget-package-pruning-in-dotnet-10/

Package pruning in .NET 10 removes platform-provided packages from your dependency graph. With transitive auditing enabled by default, projects with these defaults have 70% fewer transitive vulnerabil...

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We built an AI tool for .NET/C# developers in 2 days

https://www.roundthecode.com/dotnet-blog/we-built-ai-tool-dotnet-csharp-developers-2-days

We built an AI tool for .NET and C# developers in just 2 days using Claude's API. Here's how we did it, the prompts we used, and how you can try it now. The page We built an AI tool for .NET/C# develo...

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Jasen's take on today's picks

C# Word Library: Comparing 7 Options for .NET Developers in 2026

A useful roundup if you need Word document generation and want a quick view of tradeoffs around features, licensing, and performance.

Strategy Pattern: Choosing Without Attachment

A solid reminder that Strategy is about isolating decisions cleanly, not overcommitting to one path too early.

You Need This Hook #vscode #hooks #customization

Short, but the DI anti-pattern angle is perennial because bad composition roots quietly shape entire codebases.

How to Scale Long-Running API Requests

This is the standout architecture post today: good progression from synchronous pain toward scalable background processing patterns.

The New Agent Customization Window #vscode #customization

Worth a look if you're working with hosted services in the .NET 10 timeframe and want a quick mental refresher.

The Static HttpClient That Wouldn’t Rotate: A Tale of Pooled Connections

A nice production-story explanation of why static HttpClient is not a magic fix when connection pooling behavior works against your assumptions.

We Built an AI Agent Platform on .NET. Then Microsoft Shipped Agent Framework 1.0.

The most interesting part here is the retrospective: architecture mistakes around agent platforms are usually more valuable than polished success stories.

C# 15 and the Future of .NET: A Comprehensive Deep Dive into Union Types and the Evolution of C# 14

Speculative forward-looking language aside, union types remain a topic many C# developers are clearly watching closely.

How to run evals for the model router

Useful for teams trying to evaluate cost and quality across multiple models instead of treating routing as a black box.

Repository Pattern in .NET 10 - Do You Really Need It?

A fair challenge to defaulting to Repository everywhere, especially in smaller APIs where EF Core already gives you enough abstraction.

Repository Pattern with Entity Framework Core in .NET 10 | Clean Architecture Simplified

Helpful as a contrast piece to the previous article: if you do want Repository plus Clean Architecture, this shows the conventional shape.

Tracing Agent Sessions with OpenTelemetry & Aspire

Good observability content for anyone exploring agent workflows, especially with Aspire and OpenTelemetry in the tooling loop.

NuGet Package Pruning: Cleaner Dependencies and Actionable Vulnerability Reports

This should matter to most teams moving to .NET 10: fewer unnecessary packages and cleaner vulnerability reports are tangible wins.

We built an AI tool for .NET/C# developers in 2 days

A fast build story with concrete prompts and implementation details; interesting mainly as a practical developer workflow example.

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