JSON Contracts, AI Workflows, and Query Plans

Is Any() Really Better Than Count() > 0?

Medium

Like everything else in life, it depends.

Topics: C# Performance

System.Text.Json Polymorphism with Swagger in .NET 7

Medium

Polymorphic JSON is not finished when System.Text.Json can serialize a derived type. The same discriminator contract must survive OpenAPI…

Topics: C# System.Text.Json Web API

Operators & Control Flow in C#: What .NET Interviews Actually Ask

Medium

Value types vs reference types usually opens a .NET interview — operators and control flow is often where it continues. Most of it looks…

Topics: C#

CommandFlow — version 2.0

Medium

A few weeks ago, I presented CommandFlow, the alternative to CQRS and MediatR. The goal of the framework was to provide a simple but…

Topics: CQRS C# MediatR

Microsoft Agent Framework: Human In The Loop

YapCast – Jesse Liberty

tl;dr If you’re building automated workflows that sometimes must pause for human judgment (approvals, moderation, triage), Microsoft Agent Framework provides first‑class HITL primitives: typed Request...

Discover Essential Skills Every .NET

Medium

Introduction

Topics: C#

Authentication in ASP.NET Core

Medium

A deep-dive walkthrough of authentication in ASP.NET Core — covering the ClaimsPrincipal/ClaimsIdentity model everything else builds on…

Topics: ASP.NET Core Authentication

How can I remove the Close button from my window caption?

Microsoft Dev Blogs

Occasionally, somebody wants to create a window without a Close button. The only way to get rid of the Close button is not to have a System menu at all: Remove the WS_SYS­MENU style from the window. B...

Building a RAG Application with .NET 10 and OpenAI

Medium

A practical, step-by-step introduction to embeddings, vector similarity, retrieval, and grounded LLM responses using C# and .NET 10.

Topics: C# .NET 10 OpenAI

Adding an Index Made This Query Slower

Milan's .NET Weekly

A query already had a usable index. Adding another index made Postgres choose a plan that discarded almost half a million rows to return ten.

Topics: Performance PostgreSQL

What if an agent could refactor your agent?

YouTube

https://aka.ms/foundry-portal https://aka.ms/InsideMicrosoftFoundryPlaylist Your cupcake agent works. But is it still using the current Microsoft Foundry pattern? Would you notice if the SDK changed? ...

Topics: Azure

Value Types vs Reference Types in C#: What .NET Interviews Actually Ask

Medium

If there’s one C# fundamentals topic that shows up in almost every .NET interview, it’s this one. It sounds simple on the surface — “value…

Topics: C#

8 Modern C# Features That Make Everyday Code Shorter and Safer

Medium

C# has changed a lot since the C# 7 days, and most of the additions are not exotic language-designer toys.

Topics: C#

When (Not) to Use MCP in .NET: A Practical Guide

Medium

I built a working MCP server in C#, hit every production gotcha the tutorials skip, and then had to ask myself if any of it was necessary

Topics: C#

I Built a Finite-State Transducer in C# Because a Dictionary Wasn’t Enough

Medium

There are not many situations in normal C# development where you start with

Topics: C# Design Patterns

Why didn't ReadDirectoryChangesW provide a way to correlate the two sides of a rename operation?

Microsoft Dev Blogs

Brian Dellisanti asked why Read­Directory­ChangesW didn't provide a way to correlate the two sides of a rename operation. I wasn't there, but I can guess. My guess is that the implementation alwa