ASP.NET Security, Azure Vector Search, .NET 10
A varied .NET roundup covering ETags, passkeys, file-upload checks, Azure SQL DiskANN, RAG, MAUI trimming, SDK tooling, and memory diagnostics.
Jasen's top three picks
- 1 NVIDIA Launches Open Agent Safety Platform for AI Agents
C# Corner - Mahesh Chand
NVIDIA's agent-safety platform is worth watching as teams move from model experiments to agents with real permissions and consequences.
- 2 How to Use ETags in ASP.NET Core to Prevent Users from Overwriting Each Other’s Changes
C# Corner
ETags and If-Match are straightforward HTTP tools that prevent a surprisingly expensive class of concurrent-editing bugs.
- 3 RAG with .NET: How to Build AI Applications That Actually Know Your Data
Medium - Chaudhariparesh
RAG succeeds or fails on retrieval quality and trustworthy source content, not simply on picking a larger model.
Editor's note
I deliberately kept this a broad .NET mix, from application security and data access to AI and runtime operations. The ETags walkthrough is practical guidance for preventing lost updates, while Azure SQL’s DiskANN general availability matters for teams building vector-backed applications.
Today's articles
How to Use ETags in ASP.NET Core to Prevent Users from Overwriting Each Other’s Changes
C# Corner
Learn how to use ETags, If-Match headers, EF Core rowversion columns, and HTTP 412 responses to prevent conflicting updates in ASP.NET Core APIs.
Topics: ASP.NET Core EF Core REST API
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RAG with .NET: How to Build AI Applications That Actually Know Your Data
Medium - Chaudhariparesh
Large Language Models are powerful, but they don’t automatically know your company’s private documents, internal knowledge base, product…
Topics: OpenAI
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DiskANN Vector Index and Vector Search Are Now Generally Available in Azure SQL
Microsoft Dev Blogs - Pooja Kamath
Today, we are announcing the general availability of DiskANN Vector Index & Search across Azure SQL Database, Azure SQL Managed Instance with the always-up-to-date update policy, and SQL database in M...
Topics: Azure SQL Server
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The Bug That Only Existed in the App Store Build
Medium
How .NET MAUI’s trimmer quietly deleted code I was using, and what I do differently now.
Topics: .NET MAUI Native AOT
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Stop shipping the sops binary in your .NET images
Medium
SOPS is a good way to keep secrets in git. It encrypts the values in a YAML, JSON, dotenv, INI or binary file while leaving the keys…
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Claude Fable 5.1 vs GPT-6 Astra: HTML to PDF in C# (.NET 10)
codewithmukesh
I gave Claude Fable 5.1 and GPT-6 Astra the same invoice prompt, rendered all 10 templates with IronPDF on .NET 10 and scored them in C#. Both passed, and one print CSS rule was the only real differen...
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Upgrading to .NET 10
C# Digest
the breaking changes that don't show up at compile time
Topics: .NET 10
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Why content extraction still matters in the GenAI era
Microsoft Dev Blogs - Chu Lahlou
The future of enterprise AI is not determined by the model you choose. It is determined by whether your agents can trust the content they act on. Five years into the era of large language model...
Read articleHow to Add Passkey Login to an ASP.NET Core Application
C# Corner
Learn how to configure and register passkeys in an ASP.NET Core Identity application using .NET 10, WebAuthn, and passwordless authentication practices.
Topics: ASP.NET Core Authentication .NET 10
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Microsoft Introduces 'dotnetup' Toolchain Manager for .NET SDKs and Runtimes
Visual Studio Magazine
A public preview provides user-level .NET installation and version management, initially focused on macOS and Linux.
Topics: .NET Core
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Code-First vs Database-First in EF Core
Medium
Entity Framework Core (EF Core) is Microsoft’s ORM for .NET: it maps C# classes to database tables, so you work with objects instead of…
Topics: EF Core
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Microsoft Publisher: Access and Alternative Options
Microsoft Tech Community - Teresa_Cyrus
PENDING REVIEW: MICROSOFT ARTICLE UNRETRIEVABLE (HTTP 403). Microsoft Publisher is retiring in October 2026, but your .pub files do not disappear. The bigger question is how you will open, preserve, o...
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Pick-Pack-Ship: Modeling Warehouse Workflows with Minimal APIs
Medium
Most warehouse code starts as a Status string column and a few if statements.
Topics: Design Patterns Minimal APIs
Read articleHow to Secure File Uploads in ASP.NET Core by Checking File Signatures
C# Corner
Learn how to secure ASP.NET Core file uploads by validating file signatures, enforcing allowlists and size limits, and safely handling uploaded files.
Topics: ASP.NET Core Security
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EF Core in Clean Architecture the Pragmatic Way
Medium
Clean Architecture is one of the most popular architectural styles in .NET today.Continue reading on CodeX »
Topics: Clean Architecture EF Core
Read articleHow to Diagnose Memory Leaks in ASP.NET Core Applications in Production
C# Corner
Learn how to distinguish normal memory growth from leaks in ASP.NET Core, monitor runtime metrics, collect memory dumps, and identify retained objects in production.
Topics: ASP.NET Core Performance Profiling
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How to Retrieve Environment Variable Values Using SQL 4 CDS in XrmToolBox?
C# Corner - Arun Potti
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Dew Drop - September 28, 2026 (#4758)
Morning Dew by Alvin Ashcraft
Top Links AG-UI Protocol now has a first-class .NET SDK (Daniel Roth) Syncfusion Releases First Set of Open-Source Blazor Controls (Syncfusion Team) GitHub Copilot app for Beginners: How to build cust...
Topics: Blazor GitHub Copilot
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Contracts, Identity, Promises
Bipin Joshi .NET | Thus said a Byte • Insights on .NET and Web Development
This article explores the ideas behind COM, from interface contracts and component identity to registration and activation. It examines how COM made reusable software components possible while introdu...
Topics: .NET Framework
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