Editor's note
I pulled together a deliberately mixed issue this time: AI agents, language/runtime updates, data access, and tooling all share the page. The .NET Conf 2025 recap and the Visual Studio 2026 profiler piece are especially useful for tracking where the platform is heading. I also liked the practical posts on owned entities and mapping choices, because they connect new features to everyday architecture decisions.
AI workflows, C# 14, EF Core
Jasen Fici
December 11, 2025
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Today's Articles
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Jasen's take on today's picks
Building Autonomous Multi-Agent Systems With .NET
A practical starter on multi-agent systems, with enough workflow automation detail to move beyond toy demos.
The Real Difference Between Exceptions You Throw and Exceptions You Catch
A sharp reminder that throwing and catching exceptions are different concerns, and that distinction matters in real code.
.NET Conf 2025 Recap – Celebrating .NET 10, Visual Studio 2026, AI, Community, & More
A concise recap of .NET Conf 2025, including .NET 10, Visual Studio 2026, and the ecosystem chatter around them.
C# 14 Just Made Your Properties Smarter
C# 14 gets another useful property-focused improvement, and the examples show why small language changes still matter.
Why Your Code Looks Clean but Still Smells (Beginner’s Guide to Code Smells)
A beginner-friendly code-smells guide that explains why code can look tidy while still setting up future maintenance pain.
Stop Using AutoMapper: Mapperly & Mapster in 2025
Mapperly and Mapster get the anti-AutoMapper treatment here, with source-generated mapping and zero-allocation claims front and center.
Mastering Collections in .NET Core
A solid collections refresher covering core types plus concurrency tradeoffs, with performance notes for day-to-day use.
I Added ONE Line to My LINQ Query and Deleted 40 Lines of ‘If’ Statements
This LINQ refactor story is the kind of before-and-after that makes query composition feel worth the extra thought.
Profiler Agent - Delegate the analysis, not the performance
The new profiler agent post is more about delegation than magic, and it’s a useful look at AI-assisted performance analysis.
Will This New EF Core Feature Be the End of Dapper?
A lively Dapper-versus-EF Core comparison framed around a new EF Core feature, which should spark debate more than agreement.
How to Create a WCF Web Services in C# .NET Core
A practical WCF-in-.NET Core walkthrough for teams that still need to bridge older services into modern projects.
From Framework to Future: How .NET Evolved Into a Modern Powerhouse
This history-of-.NET piece is a nice reminder of how far the platform has moved from the original framework days.
Your .NET App Is Slow — One Keyword FIXED Everything!
A performance-minded post that suggests one keyword can change everything, though the real lesson is usually in the measurement.
Mastering owned entities in EF Core: Cleaner complex types
Owned entities in EF Core are explained well here, especially for modeling dependent value-like structures without extra tables.
Visual Studio 2026 gets a straightforward introduction, useful if you want the highlights without digging through release noise.
Content Negotiation in Dotnet Core Webapi
Content negotiation in Web API is a fundamentals post worth revisiting if your APIs serve multiple media types.
Understanding Extension Members in C# 14
C# 14 extension members round out the issue with another language feature aimed at cleaner APIs and less friction.