Esta semana hay que destacar tanto el anuncio a bombo y platillo de los modelos Claude Fable y Mythos 5 de Anthropic... como su retirada unos días después, debido una orden del gobierno de Estados Unidos por motivos de seguridad nacional. Un mundo curioso este 😉 

También se ha lanzado .NET 11 Preview 5, con novedades interesantes como el soporte para JSONL, full outer joins en LINQ, mejoras en runtime asíncrono, una nueva plantilla de proyecto MCP, jerarquías cerradas en C#, validación en cliente y QuickGrid en Blazor SSR, parámetros proporcionados por variables de sesión y muchas más cosas, que podéis encontrar detalladas aquí.

Por último, destacar un artículo sobre el principio DRY, uno de los más utilizados mientras programamos, pero que a menudo se malinterpreta. Milan Jovanović nos explica por qué y cómo debemos aplicarlo correctamente.

El resto de enlaces a contenidos interesantes, a continuación.

Por si te lo perdiste...

• Asignaciones seguras con 'null conditional assignments' de C# 14 (.NET 10)
  José M. Aguilar
• Switch expressions en C# 8
  José M. Aguilar

.NET

• Proxies en Go o C#
  Fernando Escolar
• .NET 11 Preview 5 is now available!
  .NET Team
• .NET at Microsoft Build 2026: Must watch sessions
  Daniel Roth
• Microsoft Build 2026 recap: vision, launches, and top sessions
  Jon Galloway
• Convert HTML to Markdown in C# Without Losing Structure or Images
  Mathan Kumar Varadharaja
• Model Validation in ASP.NET Core: Data Annotations and FluentValidation
  Nick Cosentino
• Boost Your .NET Projects: Future-Proofing Performance with Spargine’s Fast Methods
  David McCarter
• Introducing Corvus.Text.Json V5: Why V5 Exists
  Ian Griffiths
• The new Visual Studio Solution File Format: Goodbye .SLN, Welcome .SLNX!
  Thomas Claudius Huber
• C#14 The field keyword
  Karen Payne
• New features and Roslyn analyzers for Meziantou.Framework.FullPath
  Gérald Barré
• Introducing Corvus.Text.Json V5: Schema Validation 10x Faster & Pooled-Memory Parsing
  Ian Griffiths
• TUnit.Mocks: No Castle, No Reflection, No Drama
  Martin Stühmer
• Creating a Packaged Single File Web Site Viewer Executable
  Rick Strahl

ASP.NET Core / ASP.NET / Blazor

• ASP.NET Core background tasks with NCronJob and SignalR
  Damien Bowden
• Setting Up SAML Single Sign-On in ASP.NET with Duende IdentityServer
  Maarteen Balliauw
• The Updated Edition of Blazor Succinctly Is Now Available
  Michael Washington
• What is IdentityServer and When Do You Need it?
  Maarten Balliauw

Azure / Cloud

• App Service Build 2026 Updates
  Byron Tardif
• Faster az login: introducing --skip-subscription-discovery and targeted
  Alex Wdy
• Debug App Startup Faster on Azure App Service for Linux with Startup Logs
  Tulika Chaudharie

Conceptos / Patrones / Buenas prácticas

• DRY Is the Most Misunderstood Rule in Programming
  Milan Jovanović
• The Codebase Doesn't Know You Quit
  Martin Stühmer
• How to Structure Production Apps with Vertical Slice Architecture in .NET in 2026
  Anton Martyniuk
• Practicing Vertical Slice Architecture in ASP.NET Core
  Assis Zang

Data

• EF Core 11 makes your split queries faster
  Steven Giesel
• Base64 Encoding and Decoding in SQL Server 2025 and Azure SQL Database
  Leonard Lobel
• EF Core at scale: 5 ways to retrieve large datasets efficiently
  Ali Hamza Ansari
• Moving Indexes To A New Filegroup: Microsoft Still Hates You
  Erik Darling
• Announcing the Release of SSMS 22.7.0 - and many previews!
  Makena Barickman
• Introducing execution context for GitHub Copilot in SSMS
  Erin Stellato

Machine learning / IA

• Claude Fable 5 and Claude Mythos 5
  Anthropic
• Statement on the US government directive to suspend access to Fable 5 and Mythos 5
  Anthropic
• Long-Running Agents
  Addy Osmani

Web / HTML / CSS / Javascript

• Scroll-Driven, Scroll-Triggered, Scroll States, and View Transitions
  Geoff Graham
• Scrubbable Staggered Animation with CSS @function
  Ashutosh Biswas
• Angular 22: The Evolution of Modern Angular
  Dany Paredes
• How to detect when an element's visibility changes with JavaScript
  Chris Ferdinandi
• Creating Memorable Web Experiences: A Modern CSS Toolkit
  Mariana Beldi
• Demystifying the View Transition Pseudo Tree – Master.dev Blog
  Cyd Stumpel
• CSS: Unavoidable Bad Parts
  Alex Kladov
• Introducing execution context for GitHub Copilot in SSMS
  Mariana Beldi
• There’s no need to include ‘navigation’ in your navigation labels
  Martin Underhill
• Why Isn't My 3D View Transition Working?
  Sunkanmi Fafowora
• In-N-Out Animations: Popovers (Part 2/3) – Master.dev Blog
  Chris Coyier

Visual Studio / Complementos / Herramientas

• Copilot Code Reviews for Azure Repos
  Dan Hellem & Andrew Brenner
• Your agent just scaffolded a project from 2020
  Waldek Mastykarz
• Review pull requests without leaving Visual Studio
  Tom Pedersen

.NET MAUI

• Getting Contact Information with .NET MAUI
  Leomaris Reyes
• AI-Powered Natural Language Filtering in .NET MAUI DataGrid
  Shalini Suresh

Otros

• El superchip RTX Spark: ¿puede Nvidia superar al Apple M5 Max en portátiles?
  José Manuel Alarcón
• The Microsoft Company Party where everybody played name tag swap
  Raymond Chen

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