Topics: ASP.NET Core Azure Functions Clean Architecture C# .NET Core Security

Editor's note

I pulled together a deliberately mixed lineup this time: practical ASP.NET Core work, a few architecture pieces, and some security and production lessons. The phishing-detection and malicious NuGet articles stand out because they’re the kind of issues teams can’t ignore once they hit your pipeline. I also liked the reserved-filenames post for reminding us that old platform quirks still matter in modern .NET apps.

ASP.NET Core, security, and architecture

Jasen Fici
March 06, 2026

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Today's Articles

Implementing a Custom Transport Layer in MCP

https://www.c-sharpcorner.com/article/implementing-a-custom-transport-layer-in-mcp/

Extend MCP with custom transports! Learn to implement HTTP (JSON-RPC) and WebSocket layers in Python for flexibility, scalability, and real-time capabilities.

How to Upload Files in ASP.NET Core Web API?

https://www.c-sharpcorner.com/article/how-to-upload-files-in-asp-net-core-web-api/

Learn how to implement secure and efficient file uploads in ASP.NET Core Web API. Covers handling IFormFile, validation, storage, and security best practices.

10 C# Mistakes Developers Make (And How to Avoid Them)

https://medium.com/codetodeploy/10-c-mistakes-developers-make-and-how-to-avoid-them-dcef637f7e5f?source=rss------csharp-5

C# and .NET have matured into one of the most powerful ecosystems for building APIs, enterprise systems, cloud apps, and high-performance… Continue reading on CodeToDeploy »

Reserved filenames on Windows (CON, PRN, AUX, NUL...)

https://www.meziantou.net/reserved-filenames-on-windows-con-prn-aux-nul.htm

Windows has a set of reserved filenames that cannot be used for files or folders. These names are reserved for legacy reasons, dating back to DOS. If you try to create a file or folder with one of the...

What Is Clean Architecture in .NET With Practical Example?

https://www.c-sharpcorner.com/article/what-is-clean-architecture-in-net-with-practical-example/

Master Clean Architecture in .NET! Build scalable, testable, and maintainable applications with clear separation of concerns. Practical examples included.

Local Development Setup: Tools, Debugging, and Hot Reload

https://medium.com/@martinoehlert/local-development-setup-tools-debugging-and-hot-reload-47d5bc59b1e2?source=rss------dotnet-5

Azure Functions for .NET Developers: Series

LINQ in C#: Understanding the SelectMany() Operator [Part 2]

https://medium.com/@nikolaajdukovic/linq-in-c-understanding-the-selectmany-operator-part-2-5036daad7a43?source=rss------csharp-5

Flattening Financial Hierarchies — One Transaction at a Time 🏦

How to Detect Phishing Attacks in Email Containers using C# .NET

https://cloudmersive.medium.com/how-to-detect-phishing-attacks-in-email-containers-using-c-net-27132e425abb?source=rss------csharp-5

Phishing detection is a necessary security policy for any email server.

2️⃣ Session Management Series: Session Management and Security in ASP.NET Core — 2

https://medium.com/@melisa.akkus/2%EF%B8%8F%E2%83%A3-session-management-series-2-session-management-and-security-in-asp-net-core-3fb332c932dc?source=rss------csharp-5

When you browse the web and move from one page to another, you notice that the items in your cart don’t disappear and you’re not asked to…

Malicious NuGet Packages Target ASP.NET Developers to Steal Login Credentials

https://news.google.com/rss/articles/CBMiW0FVX3lxTE1jTEVNNVpkYzR2ckF0dXJVbHlVMUk5VHZWSDBrLXpyRmtyN3hwZGhweFM2bkRKMV9xaFVqMW1EbjFkbnl6YlVBb3NTZ1pGMWNKeUwwQmJOMnNwckE?oc=5

Malicious NuGet Packages Target ASP.NET Developers to Steal Login Credentials

Filters in ASP.NET Core – Everything You Need to Know

https://www.c-sharpcorner.com/article/filters-in-asp-net-core-everything-you-need-to-know/

Master ASP.NET Core filters! Learn to handle logging, authentication, and validation efficiently. Improve code reuse and build cleaner, maintainable applications.

Building a Real-Time Customer Support System in .NET

https://medium.com/@cao.silhouette/building-a-real-time-customer-support-system-in-net-2bd23e98fcc7?source=rss------dotnet-5

Most people think a customer support system is just a chat box.

How to Fix “Unable to Resolve Service for Type” Error in .NET Core?

https://www.c-sharpcorner.com/article/how-to-fix-unable-to-resolve-service-for-type-error-in-net-core2/

Troubleshoot the "Unable to resolve service for type" error in .NET Core! Learn to fix common DI issues like missing registrations, lifetime mismatches, and circular dependencies.

Why Your Query String Disappears in ASP.NET MVC (And the Right Way to Preserve Filter State)

https://medium.com/@PragmaticPro/why-your-query-string-disappears-in-asp-net-mvc-and-the-right-way-to-preserve-filter-state-bb72bb2935b5?source=rss------dotnet-5

If you’ve ever built a filter feature in ASP.NET MVC, you’ve probably faced this:

Our .NET App Was Leaking Memory — And One Line of Code Took Down Production

https://elanchezhiyan-p.medium.com/our-net-app-was-leaking-memory-and-one-line-of-code-took-down-production-996a98e79a66?source=rss------dotnet-5

At 2:47 PM on a Tuesday, a Slack message popped up:

In Agentic AI, It's All About the Markdown

https://visualstudiomagazine.com/Articles/2026/02/24/In-Agentic-AI-Its-All-About-the-Markdown.aspx

Markdown is emerging in VS Code and Visual Studio 2026 as a version-controlled instruction layer that governs AI agents, reusable prompts and modular skills alongside traditional documentation.

.NET and C# in the AI Race: Not a Defeat, but a Strategic Positioning

https://medium.com/@EnesEfeTokta/net-and-c-in-the-ai-race-not-a-defeat-but-a-strategic-positioning-e8035d9f7996?source=rss------dotnet-5

A common narrative in the tech world suggests:

Jasen's take on today's picks

Implementing a Custom Transport Layer in MCP

Custom MCP transports are a nice reminder that extensibility is where these platforms get interesting.

How to Upload Files in ASP.NET Core Web API?

File uploads in ASP.NET Core are useful until they aren’t; validation and storage choices matter a lot.

10 C# Mistakes Developers Make (And How to Avoid Them)

Good security hygiene roundup here: phishing detection, suspicious NuGet packages, and session handling all deserve attention.

Reserved filenames on Windows (CON, PRN, AUX, NUL...)

Reserved Windows filenames is one of those practical gotchas that still saves people from weird bugs.

What Is Clean Architecture in .NET With Practical Example?

Clean Architecture and the DI troubleshooting piece are both solid for teams tightening up app structure.

Local Development Setup: Tools, Debugging, and Hot Reload

The production memory leak story is the kind of post that earns its keep by making everyone double-check assumptions.

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