AI Evals, Part 3: Golden Datasets That Dont Lie
Part 3 of a series on building production AI on .NET. Part 1 was the overview; Part 2 was error analysis. Now we turn the failure taxonomy you built i…
Open Source
⚑ Report a ProblemLatest Open Source news from Tech News
All topics
AI
agents
ai
api
architecture
automation
aws
beginners
career
claude
database
devchallenge
devops
javascript
linux
llm
machinelearning
mcp
opensource
performance
productivity
programming
python
react
security
showdev
softwareengineering
tutorial
typescript
webdev
Your .NET RAG stack hides a Python sidecar. I built the engine that removes it.
TL;DR — Every .NET RAG project quietly ships a Python sidecar to do one job: chunk documents. I got rid of mine. DocNest .NET is an idiomatic C# / .NE…
Your Hand-Rolled Two-Phase Commit Between Two Databases Isn't Atomic
I had a write that spanned two physically separate databases. A rename that had to propagate across several tables in one database and a couple of tab…
Dynamic Column Updates in EF Core Without Hand-Rolling SQL Injection
Sometimes you genuinely need the set of columns to update to be data, not code. An operator maps configuration fields to database columns, and you wan…
Build and deploy an MCP server with .NET and Azure Container Apps
MCP servers do not have to be local stdio processes. If you want a tool surface that can run as a normal HTTP service, scale like an app, and be reach…
Dev Log: deleting code and breaking the build on purpose
Day one of building Munchausen v1.0 started with deleting the existing implementation and deliberately breaking its replacement. Munchausen is a mock-…
Munchausen: The forgotten side project from 9 years ago
9 years ago ... I started this project 9 years ago, back in 2017. Mainly because I wanted to learn a few things. Plenty of tools already existed at th…
This week in Cursor + .NET — 7 rules (week ending June 14, 2026)
Every weekday a single, opinionated rule for senior C#/.NET engineers using Cursor. Here's the full week in one read — canonical posts live on the Age…
How to Use FFmpeg with C# (No Installation Required)
Originally published at ffmpeg-micro.com Most C# video processing guides start the same way: download an FFmpeg binary, add it to your PATH, then call…
Starving the Garbage Collector: A Pragmatic Guide to Zero-Allocation C#
Over the last few weeks, I’ve open-sourced a suite of high-performance, zero-dependency C# engines. This includes a native DataFrame library ( Glacier…
Why Use Repository Pattern in Angular Applications - Best Practices
In modern Angular applications, managing data efficiently is crucial for performance and maintainability. The Repository Pattern provides a clean abst…
DefaultAzureCredential vs Client ID & Client Secret for Azure Key Vault Authentication
Securely accessing Azure Key Vault is essential for modern cloud applications. This guide compares the DefaultAzureCredential (recommended) and the cl…
Docusaurus – The Modern Docs Framework
1. What is Docusaurus? Docusaurus is an open‑source static‑site generator focused on documentation. Built and maintained by Meta (formerly Facebook), …
A Semantic Approach to WPF and MVVM with Clprolf framework
Introduction WPF and the MVVM (Model-View-ViewModel) pattern are powerful tools for desktop development. However, as applications grow, the technical …
Mastering LINQ: Extracting Distinct, Sorted Lists from a DataTable
Working with DataTable objects in C# is a daily reality for many .NET developers, but extracting clean, unique, and ordered data often feels more cumb…
Azure Application Insights: Monitoring, KQL Queries and Observability in Production
At 2am on a Tuesday, an IP address change in Microsoft infrastructure silently broke our entire integration pipeline at Blue Yonder. Messages stopped …
AI Evals, Part 2: Error Analysis The Unglamorous Superpower Behind Good Evals
Part 2 of a series on building production AI on .NET. Part 1 covered what evals are and the Analyze → Measure → Improve lifecycle. This post is about …
Blazor SSR Gets Client-Side Validation in .NET 11 Preview 5 — No More Round-Trips Just to Show a Red Border
Blazor SSR Gets Client-Side Validation in .NET 11 Preview 5 If you've built Blazor Server-Side Rendering (SSR) forms, you know the pain: a user fills …
How I Built an AI-Powered Adult (Porn) Content Scanner for Windows (And the Engineering Challenges I Didn't Expect)
Building an AI-Powered Content Scanner for Windows: Performance, Multithreading and GPU Acceleration in .NET Building software always looks straightfo…
Workflow Engine NEO trials are self-serve now, and your coding agent can grab one too
You can grab a Workflow Engine NEO trial key yourself now, no email thread. Go to trial.workflowengine.io , type a business email and a company name, …
The joy of coding a command line english dictionary program in dotnet
In today's globally connected digital village, we often come across words and syllables which are quite new to us. Most folks hardly take the trouble …
C# Compiler Lowering Explained: What Happens at Build Time - Part 1 of the "The Anatomy of Compiler Lowering" series
C# Compiler Lowering Explained: What Happens at Build Time (Part 1) itplamen itplamen itplamen Follow Jun 5 C# Compiler Lowering Explained: What Happe…
docfx-remote-include: inline remote markdown into DocFX, and govern the assembled page
docfx-remote-include is a Markdig extension and a dotnet CLI tool for DocFX . It does two things: it inlines markdown fetched from an HTTP service at …
The AI-generated C# that passes review and breaks in production
TL;DR — AI assistants are producing C# that looks correct and passes review, but reintroduces production regressions we spent years training out of te…
I built a native C# Grep engine that's holding it's own with ripgrep (with zero allocations)
Let’s be honest: the golden rule of modern software engineering is "never rewrite grep." Tools like ripgrep are written in native Rust, compiled strai…
Building a Metadata-Driven Runtime API Platform for Analytics Systems
Building a Metadata-Driven Runtime API Platform for Analytics Systems 1. Business Problem When I joined this project as a consultant, I almost said no…
Classes, Enums, and Records Look Like Simple Language Features — Until You Realize They Define Your Entire Domain Model
Classes, Enums, and Records Look Like Simple Language Features — Until You Realize They Define Your Entire Domain Model Why Senior .NET Engineers Spen…
How to Install Tailwind CSS v4 in a .NET Blazor App (The Easy Way)
A step-by-step, beginner-friendly guide to stripping out Bootstrap and setting up the blazing-fast Tailwind CSS v4 compiler in your .NET Blazor Hybrid…
How to Install Tailwind CSS v4 in a .NET Blazor App (The Easy Way)
A step-by-step, beginner-friendly guide to stripping out Bootstrap and setting up the blazing-fast Tailwind CSS v4 compiler in your .NET Blazor Hybrid…
I built an audit log for EF Core that can actually undo a change
If you've shipped a few business apps you've probably written the same thing more than once: an audit log. A table that answers "who touched this row,…