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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…
I Built a Free Windows App So My Coding Agents Keep Running With My Laptop Lid Closed.
I lost a six-hour agent run to a closed laptop lid, and that is the whole reason this app exists. I had a coding agent working through a large refac…
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…
.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…
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…
GPT-5.6 Sol Is Now in Foundry — What It Means If You Write C#
Microsoft has a habit of quietly upgrading the model behind a stable endpoint name instead of forcing everyone to migrate to a new one. That's exact…
.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…
.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…
Completion Is an Ownership Boundary
An async method can finish its useful work and still be holding lifecycle state that tells the rest of the system it is active. That sounds like a t…
.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…
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…
.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…
I rebuilt the "Simple Web Server" from 20 years ago.
20 Years Ago, I Built a Simple Web Server by Reading HTTP Specs. Today, I Rebuilt It with Modern .NET and AI. Back in 2005, I read through HTTP prot…
MCP C# SDK Hybrid Sessions: Serve Old and New Clients on One Endpoint
The MCP C# SDK hybrid sessions option solves an awkward upgrade boundary: some clients still use the 2025-11-25 initialize handshake and depend on s…
MCP x-mcp-header Validation: Keep Bad Tool Schemas Out of tools/list
MCP x-mcp-header validation is easy to miss because the annotation looks like ordinary JSON Schema metadata. On the 2026-07-28 Streamable HTTP trans…
[Showoff] Tired of DependencyProperty boilerplate? I built a Zero-Allocation Source Generator for WPF/MAUI with strict type safety.
Hey everyone, Let's face it: writing DependencyProperty in .NET UI frameworks is a chore. Typing out DependencyProperty.Register with 20 lines of bo…
When Rider Forgets How to Write Assembly Definitions: My Day-Long Fight With UnityAtoms
Yesterday, adding a dependency in Jetbrains Rider was a non-event: type the class name, hit Alt+Enter , keep coding. Today, the exact same shortcut…
Supabase .NET DevLog #6
Welcome to our weekly log for the Supabase .NET SDK 🎉 Following the monorepo migration, I started working towards the new major v8.0.0: Upgraded all…
Sending Email Using Gmail SMTP
* 1. Create the Email Service Interface * public interface IEmailService { Task SendEmailAsync( string recipientEmail, string subject, string body);…
I Spent 30+ Hours Building "The Boring SaaS Stack" So I Never Have To Do It Again
We’ve all been there: You get an exciting idea for a micro-SaaS on a Friday night. You fire up your IDE, ready to build the core feature that solves…
xUnit 4 ParallelMode.All: Protect Shared State from Test Races
xUnit 4.0.0 makes full test-case parallelization an explicit option. That is useful, but xUnit 4 ParallelMode.All changes a quiet assumption in many…
ASP.NET Core 10 Authentication Metrics: Distinguish No Result from Failure
When every unauthorized request becomes the same dashboard line, diagnosis turns into guessing. ASP.NET Core 10 authentication metrics give me a bet…
MFA Enabled Is Not MFA Verified
A two-factor flag in the user store looks like a reassuring authorization check. It tells us the account has a second factor configured. For a sensi…
Graph Theory in C#
Using graph search to solve real-world problems in C# Most day-to-day C# work involves flat collections: filter a list, sort a table, look something…
My JetBrains Rider Setup for Surviving Live-Coding Demos
Hey lovely readers, If you've read any of my Public Speaking at Tech Events 101 blog posts, you already know I take demo prep very seriously. What I…
The Heart of .NET: A Deep Dive into the System Namespace
If you write C# every day, you use the System namespace all the time — probably without thinking about it. In this post, we'll slow down and really…