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Catch by Recovery Policy, Not Convenience

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Building a High-Performance Fan Speed & Temperature Manager with C# and .NET

Hello, I'm Dr. Jhonatan. I recently published an open-source Windows Forms application built with C# / .NET designed for real-time hardware temperat…

Performance Engineering: What Is the System Waiting For?

When a request takes five seconds, the obvious question is what to make faster. The more useful question is what, precisely, the system spent those…

storage_size.js Module in WebForms Core

What is WebForms Core? WebForms Core is a modern technology from Elanat , introduced in 2024, that provides a two-way communication model between se…

Claude Structured Outputs Refusal Handling: Stop Parsing HTTP 200 Refusals

Claude structured outputs refusal handling belongs before domain deserialization. A successful HTTP exchange only says the API accepted and processe…

.NET 10 ActivitySamplingResult PropagationData: Why Recorded Turns False

.NET 10 changed a small tracing rule that can quietly invalidate a custom sampler. With .NET 10 ActivitySamplingResult PropagationData , a child act…

Retries Are Not a Recovery Strategy

A retry answers a narrow question: might the same operation succeed if I attempt it again? Recovery has a harder job. It must bring the original bus…

Any Language, One Store: How Zaris Speaks the Redis Protocol

Zaris is a distributed key/value store built for .NET, with its own binary protocol and native .NET clients. With 2.0.0, every Zaris node can also e…

10 EF Core Performance Mistakes That Ship to Production

If your API is fast with seed data but slows down in production, EF Core is rarely the root cause. It is usually the amplifier. Most teams do not ha…

System Design: Payment Processing System

System Design: Payment Processing System A capstone system design walkthrough — designing a payment processing system end to end — covering the core…

NET Framework Essentials: Web Development Simplified

Your backend framework will outlive your current team. Choose one that the next team can still navigate — here's why .NET has been that framework fo…

From Your First Line of C# to Building with .Net: A Practical Learning Journey

When people hear .NET, they often think of C#. And while C# is a huge part of the .NET ecosystem, . * NET is much bigger than a programming language…

.NET 10 BufferedStream WriteByte: Flush Full Buffers Explicitly

BufferedStream.WriteByte had a surprising side effect through .NET 9: the call at its internal capacity boundary also called Flush() on the wrapped…

Supabase .NET DevLog #7

Welcome to our weekly log for the Supabase .NET SDK 🎉 Last week, I continued tweaking the quality gate, especially regarding code coverage. I faced…

Authorize Can't See Your Data

The first authorization bug I ever shipped wasn't a missing [Authorize] attribute. It was the opposite — everything had [Authorize] , the tests were…

Three things I got wrong measuring my own cache

A team that produces regulatory documents kept getting the same kind of question from other teams: does the current rule allow X? Answering meant so…

.NET 10 NU1510 Package Pruning: Fix CI Without Breaking Legacy Targets

.NET 10 NU1510 package pruning can turn an SDK upgrade into a failed restore when a repository promotes warnings to errors. The tempting fix is to d…

Effective AI Agents with GitHub Copilot

The most successful AI agent do NOT use complex and over-engineered frameworks. Instead, they use simple, modular patterns. To use agents you don't…

Mocking Frameworks: Simulating Dependencies in Tests

Mocking Frameworks: Simulating Dependencies in Tests A practical guide to mocking frameworks in .NET — Moq and NSubstitute — covering what a test do…

Controllers vs Minimal APIs: Stop Picking a Winner

Every .NET 10 project I start now has the same five-minute argument with myself: Controllers or Minimal APIs? Both are first-class citizens in .NET…

AutoHttps: automatic HTTPS for ASP.NET Core with no NuGet dependencies

I have been building AutoHttps, a small library that gets and renews TLS certificates for an ASP.NET Core app on its own. You add the package, name…

.NET 10 NU1015: Fix PackageReference Without Version Restore Failures

.NET 10 NU1015 turns a PackageReference without a version into a restore error. I like the stricter default because an unbounded direct dependency c…

.NET 10 JSON Console Logging: Stop Parsing State.Message

The .NET 10 JSON console logging change is small enough to miss during an upgrade: the formatted message still exists, but a typical record no longe…

Automatic HTTPS on Kestrel in 2026, now that LettuceEncrypt is archived

If you run an ASP.NET Core app directly on Kestrel, with no nginx or cloud load balancer in front, getting a real TLS certificate has always been th…

A Reason Code Without a Source Is Half a Diagnostic

A failure message can be technically correct and still be frustratingly incomplete. Consider a timeout. It tells us something important about the fa…

MCP C# SDK Array Tool Outputs: Stop Looking for a `result` Wrapper

MCP C# SDK array tool outputs are easy to misread after a protocol upgrade. A client written around the older wire shape may always reach for struct…

I Brought IdentityServer Back to Life as Open Source (.NET 8)

I Brought IdentityServer Back to Life as Open Source (.NET 8) The original IdentityServer project was commercialized. Instead of letting it die, I t…

.NET 10 Numeric String Sorting: Put File 10 After File 9

When I display generated filenames, .NET 10 numeric string sorting gives me the order people usually expect: file9.txt before file10.txt . The new C…

BlazorMemory 1.0 is out. Ten months, 14 packages, and what I got wrong along the way.

I started BlazorMemory in January because I wanted an AI chat assistant in Blazor that remembered things. I looked for a .NET library that did this.…

Parsing IP addresses in C# at crazy speeds