dotInsights | October 2025

Rachel Appel

Did you know? 

The yield return keyword allows you to pause and resume execution of a method, enabling lazy evaluation without generating intermediate collections. This makes writing custom iterators simple and efficient.

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

📆 Just two more days until… ⏰

🥳 JetBrains .NET Days Online 2025 🎉

🔗 Links

Here’s the latest from the developer community.

• Exploring the BusyIndicator in .NET MAUI – Leomaris Reyes
• ToDictionaryAsync retrieves the whole object from the database in Entity Framework – Steven Giesel
• Decouple yourself from your LLM commodities using Dapr Conversation – Laurent Kempé
• Genetic Algorithms vs. Other Optimization Techniques: A Developer’s Perspective and Case Study: Using a Genetic Algorithms to Optimize Hyperparameters in a Neural Network – Chris Woodruff
• Why You Should Be Using .NET 10’s New TLS Certificate – Khalid Abuhakmeh
• Stop Writing if (!x) — Here’s Why It’s Bad Software Design 🎥 – CodeOpinion by Derek Comartin
• Using and authoring .NET tools – Andrew Lock
• 2code ^ !2code [S2025E12] Multi-targeting Roslyn Components – Part 2 🎥 – Eva Ditzelmüller & Stefan Pölz
• Why Most .NET Developers Don’t Need MediatR 🎥 – Gui Ferreira
• What’s New & Next for .NET MAUI and Blazor Hybrid (NDC Oslo 2025) 🎥 – Rachel Kang 
• Karl-Henrik Nilson on Software Archaeology [EPISODE 872] – Technology and Friends by David Giard
• Java vs C# – Part 1 & Java vs C# – Part 2 – Ricardo Peres
• Add API key authentication to an Minimal API endpoint – David Grace
• Fine-Grained Authorization in ASP.NET Core with Auth0 FGA – Andrea Chiarelli
• How to Export Excel Chart to Image in C#: PNG & JPEG Formats – Mohan Chandran
• Speed Up Your Stripe Dev Loop With .NET Aspire – Julio Casal
• Working and Testing Against Scheduled Messages with Wolverine Jeremy D Miller
• Demystifying async void in C#: Why It’s Dangerous and When It’s Okay – Ali Hamza Ansari
• When AI Writes Code, Who Secures It? – Chloé Messdaghi
• LLM Tornado – The .NET library to build AI systems with 100+ LLM APIs – Matěj Štágl
• Measuring UI responsiveness in Resharper – Kevin Gosse
• Logging Like a Pro — Serilog + OpenTelemetry in .NET – Nisar Ahmed
• Top 10 Azure Mistakes and Pitfalls to Avoid – John Kilmister
• Morse Code Messages with C# – Bryan Hogan
• Prompt Engineering Is Requirements Engineering (We’ve Been Here Before) – Andrew Stellman

🔦 From our .NET Guide

Each month we feature tutorials or tips from our .NET and other technology Guides..

New AI Editor by JetBrains: Junie (Cursor killer??)

Watch as Nuno Maduro explores Junie.

Read More

Object Retention

Inspect retention paths for an instance or a group of objects.

by Khalid Abuhakmeh

Read More

☕ Coffee Break

Take a break to catch some fun social posts.

This blog post is hilarious. It’s how we look to non-developers. How I, a non-developer, read the tutorial you, a developer, wrote for me, a beginner – Annie Mueller

It’s no conspiracy….it’s CLIPPY!

We’ve all been there….

🗞️ JetBrains News

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

🥳 Announcing: JetBrains .NET Days Online 2025 🎉

GameDev Day 2025 Is Back in October!

• More Updates and Fixes for ReSharper and Rider 2025.2
• The Early Access Program for Rider 2025.3 Is Now Open!
• The Early Access Program for ReSharper and .NET Tools 2025.3 Is Here!
• The First Set of Updates and Fixes for ReSharper and Rider 2025.2 Is Out!

✉️ Comments? Questions? Send us an  email. 

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