The .NET News Daily Issue #415

https://medium.com/@michael.kopt/modernizing-net-part-14-migrating-from-webhost-to-webapplication-in-asp-net-core-612a7a8e1b88?source=rss------dotnet-5

WebHost was common in early ASP.NET Core apps. This post shows how to migrate to the modern WebApplication model.

https://www.pietschsoft.com/post/2026/01/17/how-to-convert-string-to-enum-and-back-in-csharp

Enums are great for making code more readable and less error-prone than passing around “magic strings” or numbers. But in the real world, strings still happen — config files, query strings, JSON paylo...

https://blog.gopenai.com/building-a-rag-retrieval-augmented-generation-system-in-net-with-a-practical-example-aad1be72b384?source=rss------dotnet-5

Artificial Intelligence applications often struggle with one major limitation: Continue reading on GoPenAI »

https://www.c-sharpcorner.com/article/15-c-sharp-performance-mistakes-that-kill-your-application-and-how-to-fix-them/

Boost C# app performance! Discover 15 common mistakes that kill scalability & learn how to fix them. Essential for APIs, microservices, & high-throughput systems.

https://devblogs.microsoft.com/oldnewthing/20260312-00/?p=112136

We start our survey of historical stack limit checking functions on Windows with the 80386 family of processors. This function has actually changed form over the years, so we'll start with the "o...

https://www.milanjovanovic.tech/blog/optimizing-bulk-database-updates-in-dotnet

Seven approaches to bulk-updating rows in PostgreSQL from .NET using Dapper and EF Core, from naive per-row updates to binary COPY. Each step cuts down on round-trips or removes dynamic SQL entirely.

https://www.c-sharpcorner.com/article/nullable-reference-types-in-c-sharp-eliminating-the-billion-dollar-mistake/

C#'s Nullable Reference Types (NRT) combat the infamous "billion-dollar mistake" by catching null reference exceptions at compile time, boosting code reliability and maintainability.

https://www.youtube.com/watch?v=VviZ6ViEhGw

In this episode of Data Exposed, see how AI and Copilot in Microsoft Fabric Data Factory help you go from Azure SQL data to insights in minutes. 3:07 Data Factory in Microsoft Fabric

https://medium.com/@nuthim/serilog-email-sink-a-production-ready-setup-guide-e1da7f2ed149?source=rss------csharp-5

One config section. Async delivery. Your errors find you.

https://devblogs.microsoft.com/azure-sdk/azd-appservice-swap/

Swap deployment slots from your terminal—azd already knows your app. Azure App Service deployment slots let you stage changes and swap them into production with zero downtime. With azd, you can

https://developer.microsoft.com/blog/github-copilot-dev-days

Modern software development is moving fast—and AI is now a practical part of how Microsoft developers design, build, and ship applications e

https://devblogs.microsoft.com/ifdef-windows/windows-app-development-cli-v0-2-net-support-manifest-placeholders-winapp-store-and-more/

This release is driven largely by community feedback and packs in native .NET project support, manifest placeholders that eliminate hardcoded executable names, Microsoft Store Developer CLI integratio...

https://towardsdev.com/building-a-real-time-customer-support-system-in-net-8757ea790fd4?source=rss------dotnet-5

Most people think a customer support system is just a chat box. Continue reading on Towards Dev »

https://www.youtube.com/watch?v=A8LiOBd5AgQ

https://medium.com/@mohsho10/stop-building-crud-apis-modern-net-systems-dont-look-like-that-anymore-146b9f7fce4a?source=rss------dotnet-5

A field guide for senior engineers who don’t want to ship 2010 architecture in 2026