Editor's note
I picked a broad mix this time, from low-level memory optimization to bigger-picture modernization work. The GitHub Copilot agent mode piece stood out for teams planning upgrades, and the TUnit story is a good look at where .NET testing is heading.
Memory optimization, C# 14, and Azure modernization
Jasen Fici
November 25, 2025
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Today's Articles
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Jasen's take on today's picks
5 .NET Memory Optimization Patterns for High-Performance Systems
Practical memory patterns for reducing GC pressure and boosting throughput in real systems.
No more public partial class Program in .NET 10
A useful heads-up for teams relying on public partial Program in API tests before .NET 10 changes land.
Understanding HTTP Methods in Web API (.NET)
A clear refresher on HTTP methods that’s still valuable for building and reviewing Web API endpoints.
Working with ASP.NET WebForms in Visual Studio 2026: A Practical Guide
WebForms in Visual Studio 2026 is a niche but notable reminder that legacy stacks still need care.
5 Underrated C# Moves That Make You Wonder Why You Ever Wrote Code the Old Way
Handy C# language tips that trim boilerplate and make code intent easier to read.
Fire-and-Forget in .NET: The Silent Trap You Don’t See Coming
A strong warning on fire-and-forget work: background tasks can fail quietly unless you design for it.
Master SQL with 100 Challenging Questions: Test Your Database Skills
A SQL practice article is less .NET-specific, but it still helps sharpen the database skills many app devs need.
C# 14: Introducing partial constructors and partial events
C# 14 partial constructors and partial events look small, but they can simplify larger generated codebases.
What I Stopped Doing as a Senior .NET Developer
A thoughtful senior-developer reflection that pairs well with the other engineering-practice pieces here.
A step-by-step guide to modernizing .NET applications with GitHub Copilot agent mode
Microsoft’s Copilot agent mode guide is the issue’s modernization anchor, especially for upgrade-heavy teams.
How to Build HIPAA-Compliant ASP.NET Healthcare Apps in 2026
HIPAA guidance for ASP.NET healthcare apps brings security, Azure, and deployment concerns together nicely.
C# 14 and .NET 10: The Most Developer-Friendly Release in Year
C# 14 and .NET 10 are framed as a genuinely developer-friendly release, with examples beyond the headline features.
How String in C# Supports Reliable Data Consistency in Daily Operations
A string-focused article that reads more foundational than groundbreaking, but consistency matters in production.
C# 14: Introducing Null-Conditional Assignment
Null-conditional assignment is a tiny syntax addition with a real readability payoff.
The VS Code plan agent video points to where AI-assisted workflows are heading inside everyday editor work.
How can I detect that Windows is running in S-Mode, redux
Old New Thing remains good at low-level Windows trivia, even when it’s only loosely related to .NET.
DotnetFastMCP: The “Fast Lane” for Building AI Tools in .NET
DotnetFastMCP is interesting if you’re exploring AI tool integration and model-driven app dev in .NET.
Versioning APIs Like a Senior Engineer: Avoid Breaking Changes and Scale Safely
The API versioning piece is broadly useful engineering advice, though it’s not .NET-specific.
TUnit — Why I Spent 2 Years Building a New .NET Testing Framework
TUnit’s origin story is the kind of testing-framework writeup that helps people evaluating alternatives to xUnit.
What’s New in Semantic Search for Azure Cosmos DB at Ignite 2025
Azure Cosmos DB’s Ignite update adds search capabilities that matter for semantic and vector-heavy workloads.