#574 – September 14, 2025
.NET 10 brings major performance gains across the entire platform
Performance improvements in .NET 10
about 1 hour by Stephen Toub
.NET 10 brings major performance gains across the entire platform. The JIT compiler adds smarter optimizations like better escape analysis that enables more objects to be stack-allocated, improved devirtualization that eliminates virtual method overhead, and enhanced bounds check elimination. The runtime also features better code layout algorithms and expanded vectorization support.
Junie is a new AI agent in JetBrains Rider
sponsored by Jetbrains
Meet Junie, you new AI coding agent, now available in JetBrains Rider, the world’s most loved IDE for .NET and game development. Junie doesn’t just assist — it works alongside you. Use Code mode for delegating coding tasks or Ask mode for brainstorming features or new solutions.
C# magical syntax
8 minutes by Ricardo Peres
C# has several hidden patterns that work through naming conventions rather than specific interfaces. You can use foreach with any class that has a GetEnumerator method, even without implementing IEnumerable. Classes can support tuple deconstruction by adding Deconstruct methods with out parameters. Collection initialization syntax works with any class that has an Add method and implements IEnumerable.
Visual Studio 2026 insiders
4 minutes by Mads Kristensen
Visual Studio 2026 Insiders introduces AI that's deeply integrated into coding workflows rather than added as an afterthought. The release delivers major performance improvements, making solution loading and building much faster across large codebases. It features a modern design with cleaner visuals and 11 new color themes.
The value of custom exceptions
4 minutes by Scott DePouw
Exceptions help developers understand why code fails instead of just crashing. C# offers built-in exception types, but custom exceptions provide more value. Custom exceptions use domain-specific terms that make errors clearer and easier to fix. They also improve testing by reducing false positives and make code maintenance easier by centralizing error messages.
Azure blob storage: A simple CRUD with ASP.NET Core MVC
8 minutes by Ravindra Devrani
In this tutorial Ravindra shows how to build a web app that stores images in Azure Blob Storage. You'll create an ASP.NET Core MVC app that uploads images to Azure's cloud storage while saving image URLs in a SQL Server database. The app includes full CRUD operations for managing person profiles with pictures. Key steps include setting up Azure storage, creating models and services, and building controller methods for create, read, update, and delete functions.
And the most popular article from the last issue was: