dotInsights | October 2026

Did you know? The System.Threading.Interlocked class provides atomic operations on shared variables, so multiple threads can update them safely without a lock.

Welcome to dotInsights by JetBrains! This newsletter is the home for recent .NET and software development related information.

🔗 Links

Here’s the latest from the developer community.

C# 15 Collection Expression Arguments: What’s New vs C# 12 and 13 and TypeSafe’s Jev AI Model in .NET: A Community SDK for Structured AI Output in C# – Laurent Kempé

Creating an Account UI in .NET MAUI – Leomaris Reyes

Adding Properties with extension methods in C# 14 – Steven Giesel

Control Flow Obfuscation: A Practitioner’s Guide for .NET and Java Teams – Michelle Pruitt

The hidden trap of fixed buffers in C# – Kevin Gosse

Interactive Terminals in the Browser with Aspire and .NET!!! 🎥 – Isaac Levin

Using ASP.NET Core Passkeys for Second Factor Authentication – Maarten Balliauw

The pain of serializing unions and closed class hierarchies with System.Text.Json – Andrew Lock

My Claude Code Status Line (Steal It) 🎥 – Gui Ferreira

You’re Not Doing Event-Driven Architecture. You’re Doing CRUD Over Pub/Sub 🎥 – CodeOpinion by Derek Comartin

How fast can you fix a UTF-16 string in C#? – Daniel Lemire

The Design Patterns Handbook: Learn Popular Design Patterns with C# Code Examples – Isaiah Clifford Opoku

Maybe We Shouldn’t Be Reviewing All This Code – Rachel Laycock

I counted Claude Code’s mistakes for six months – Chris Devine

What really happens when you let AI design your database schema (everything you should know) – Lukas Vileikis

.NET Object Pooling: Reducing Allocation Costs and GC Pressure – David McCarter

Why generative AI won’t create 10x developers – Ricardo Piccoli

Getting started with RAG in ASP.NET Core – Ali Hamza Ansari

How We Built a Real-Time Stock Pricing System at Scale – Mohsen Rajabi

How To Unit Test a C# Processing Pipeline – Nick Cosentino

What is middleware in ASP.NET Core and the gotchas – David Grace

Using C# 14 to build “Smart records” for config & settings models – Ali Hamza Ansari

Worse is better: C# versus F# – Mark Seemann

Introducing Shiny.AppFunctions — One C# Declaration for Siri and Gemini – Allan Ritchie

What changes when EWS Managed API code moves to Microsoft Graph – Jack Marchewka

C♯ 14 Extension Types and Static Members – Next-Gen Extension Architecture for Clean .NET 10 Code – Kunal Chowdhury

The Design Patterns Handbook: Learn Popular Design Patterns with C# Code Examples – Isaiah Clifford Opoku

Use C# unions and closed hierarchies in ASP.NET Core – Dmitrii Korolev

Agent Skills 101 – Jesse Liberty

How to Augment Voice Calls with Twilio Intelligence in C# – Matthew Setter

☕ Coffee Break

Take a break to catch some fun social posts.

📖 It’s just how things are now ….

📨We’ve all been there.

🖥️ What kind of IT department is this?!?

🗞️ JetBrains News

What’s going on at JetBrains? Check it out here:

🎉 .NET Day Online 2026 | October 7, 2026 at 11:00 CEST | tune in here 🎉`

Rider 2026.2.3 Is Released!

Rider and ReSharper 2026.2.2 Are Out!

Why Rider and ReSharper Were Slow to Start, and How Microsoft Helped Fix the Problem

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