Home Archive Copilot upgrades and C# design – .NET News Daily Issue #389 (Feb 11, 2026)

Editor's note

I pulled together a deliberately mixed lineup this time: AI-assisted modernization, core C# craft, performance work, and data/platform articles. The Copilot upgrade walkthrough is useful if you’re planning a legacy-to-modern .NET move, and the deep dive on delegates and events is a solid senior-level refresher. I also liked the idempotency piece because it gets past the theory and into the real failure modes we see in production.

Copilot upgrades and C# design

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Today's Articles

Prompt Engineering — Self-Consistency, Direct Stimulus & ReAct

https://henriquesd.medium.com/prompt-engineering-self-consistency-direct-stimulus-react-915f2b47d8a9?source=rss-6c0c2fb74009------2

In this article, I present the Self-Consistency, Direct Stimulus Prompting (DST), and ReAct (Reasoning + Acting) techniques . When executed multiple times, the answers are compared to identify those t...

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How to Demonstrate Deep C# Knowledge: A Guide Through Delegates and Events

https://medium.com/@a88459459/how-to-demonstrate-deep-c-knowledge-a-guide-through-delegates-and-events-1c1ee5537150?source=rss------csharp-5

Preparing for a C# interview? Or looking to validate your senior-level expertise? Here’s the truth: nothing showcases your advanced grasp…

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Upgrade to modern .NET with GitHub Copilot: Assess → Plan → Execute

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

In this video, I demo the GitHub Copilot app modernization agent inside Visual Studio and walk through the full upgrade workflow: Assessment → Planning → Execution. You’ll see a full end-to-end demo o...

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Robust Strategy Pattern in .NET 10: Building a Fail-Safe Tax Calculation Engine

https://medium.com/@aman.toumaj/robust-strategy-pattern-in-net-10-building-a-fail-safe-tax-calculation-engine-5ecb3003f2dd?source=rss------dotnet-5

Practical guide to building a flexible, testable, and fail-safe tax calculation engine using C# features. Why your next business-critical…

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Enable Soft Delete in Azure SQL

https://devblogs.microsoft.com/azure-sql/soft-delete-in-azure-sql/

Sometimes applications need to remove data without actually losing it. Soft delete keeps rows in the database while making them invisible to normal application access. This is especially valuable when...

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⚡ Our .NET API Was Taking 8 Seconds to Respond — Here’s How I Brought It Down to 200ms

https://elanchezhiyan-p.medium.com/our-net-api-was-taking-8-seconds-to-respond-heres-how-i-brought-it-down-to-200ms-850e064a59f2?source=rss------csharp-5

“The API is slow again.” — Four words every backend developer dreads hearing on a Monday morning.

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Getting started with the GitHub Copilot CLI, custom agents, MCP servers, and more

https://www.youtube.com/watch?v=GeH0PWdl_Hc

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New to .NET? Start Here.

https://medium.com/@sweetondonie/new-to-net-start-here-a9a934d8c1a9?source=rss------dotnet-5

If .NET still feels confusing after tutorials, you’re not doing anything wrong.

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VS Code Live - The Modern Software Product Organization

https://www.youtube.com/watch?v=TOAAKp9NYDw

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Azure Cosmos DB Data Explorer now supports Dark Mode

https://devblogs.microsoft.com/cosmosdb/azure-cosmos-db-data-explorer-now-supports-dark-mode/

If you spend time in the Azure Portal’s using Azure Cosmos DB Data Explorer, you know it’s a “lots of screens, lots of tabs, lots of work happening” kind of place. So I’m excited to share a small upgr...

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Hire C# Developer: How Companies Find the Right Talent for Scalable Software

https://www.c-sharpcorner.com/article/hire-c-sharp-developer-how-companies-find-the-right-talent-for-scalable-software/

Looking to hire a C# developer for your startup or enterprise project? Learn how to find skilled C# and .NET developers, avoid hiring mistakes, and work with experienced consultants and architects to ...

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Your Idempotent Code Is Lying To You

https://codeopinion.com/your-idempotent-code-is-lying-to-you/

You have some code that handles placing an order. This could be an HTTP API or a message handler. You made it idempotent. You added a unique constraint on some kind of message ID. And somehow… you sti...

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Result Pattern: Handling Expected Failures Without Using Exceptions

https://donmahsu.medium.com/result-pattern-handling-expected-failures-without-using-exceptions-86bae15d9d9c?source=rss------dotnet-5

Recently, while I was cleaning up some business logic in an old system, I noticed that almost all error handling was done with try/catch…

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EF Core things I wish I’d known earlier

https://medium.com/@denmaklucky/ef-core-things-i-wish-id-known-earlier-0498826fdebf?source=rss------csharp-5

Entity Framework in general, and DbContext in particular, are powerful things. If you want to deepen your understanding that help you use…

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Building Modern Web Applications with Angular, .NET, and OAuth 2.0 — Complete Tutorial Series

https://medium.com/scrum-and-coke/building-modern-web-applications-with-angular-net-and-oauth-2-0-complete-tutorial-series-7ea97ed3fc56?source=rss------dotnet-5

Learn how to build secure, scalable enterprise applications using the CAT Pattern (Client, API Resource, Token Service) with Angular 20… Continue reading on Scrum and Coke »

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The danger of glamourizing one shots

http://feeds.hanselman.com/~/945480803/0/scotthanselman~The-danger-of-glamourizing-one-shots

People should not be judging AI-augmented coding by “1 shots.” If someone told you that their model did a “one shot of Minecraft” and they’re impressed by that, you need to consider how much semantic...

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Jasen's take on today's picks

Prompt Engineering — Self-Consistency, Direct Stimulus & ReAct

A practical look at prompt techniques, not just buzzwords.

How to Demonstrate Deep C# Knowledge: A Guide Through Delegates and Events

Good refresher on delegates and events for interview prep or real-world code reviews.

Upgrade to modern .NET with GitHub Copilot: Assess → Plan → Execute

A useful end-to-end modernization demo with Copilot in Visual Studio.

Robust Strategy Pattern in .NET 10: Building a Fail-Safe Tax Calculation Engine

A fail-safe strategy example grounded in business logic, not abstractions.

Enable Soft Delete in Azure SQL

Soft delete in Azure SQL is one of those features teams keep needing.

⚡ Our .NET API Was Taking 8 Seconds to Respond — Here’s How I Brought It Down to 200ms

A strong reminder that idempotency is trickier than the happy path suggests.

Getting started with the GitHub Copilot CLI, custom agents, MCP servers, and more

A clean explanation of result-style error handling without exception overuse.

VS Code Live - The Modern Software Product Organization

EF Core lessons that save time once your app grows up.

Hire C# Developer: How Companies Find the Right Talent for Scalable Software

A full web app/security tutorial spanning Angular, .NET, and OAuth.

Your Idempotent Code Is Lying To You

A timely warning against overrating AI “one-shot” demos.

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