Sergiy Teplyakov

Hey #dotnet people! I've launched my YouTube channel: "Dissecting the Code". It's going to be very similar to my blog with a lot of deep dives into #dotnet, #csharp etc. I've already published the first two videos: ➡️ Episode 0: What You'll Learn Here ➡️ Episode 1: Dissecting Variable Lifetime

New video on Dissecting the Code YouTube Channel: "How LINQ works?" - youtu.be/hFKCOeUfZaA?... To understand LINQ we should understand iterator blocks. And this is what I'm covering for almost 20 minutes! :)

PerfView can record all managed exceptions in all processes system-wide thanks to the .NET ETW provider, with callstacks. I built a viewer for these .etl files:

Do you know that just changing the C# langversion might affect performance? The code generation for method group conversion has changed in C# 11 to avoid allocations in certain cases.

Do you know that .NET 10 massively reduces the overhead of using any built-in collections via interfaces (yes, not only for arrays)? Iterating a list via IList<T>, or dictionary via 'IDictionary<K,V>', etc., now has almost zero abstraction penalty!

I'm writing another book, and the first few chapters are available through Manning Early Access now! For 50% off! hubs.la/Q03Q9PGP0 More details, and the story of how I came to write it, are on my blog at ericlippert.com/2025/10/30/i... It feels great to be writing again after a long break. :)

New blog post: In 2021 I found an invisible memory leak in a tool (VS Code) that I have never used. Impossible? Easy: randomascii.wordpress.com/2025/10/09/f...

Egor landed yesterday a great document about C# "Unsafe code best practices" https://github.com/dotnet/docs/blob/main/docs/standard/unsafe-code/best-practices.md 📜 Even if you think you know them, it is a good read as a reminder! 😎 #dotnet #csharp

Hey #dotnet folks! Please share latest deep-dive video to spread the knowledge about async internals and tips&tricks on debugging .NET code! Your support means the world! /cc: @scott.hanselman.com, @ardalis.com, @terrajobst.net, @migueldeicaza.bsky.social and every other member of .net community!

Hey guys. Async methods might be scary for some, but they're not that complicated if you can debug the async machinery to understand how they work! This is exactly what I did in the last video - "Let's debug async/await in C#". youtu.be/oHKyzgGjKHQ?...

Hey #dotnet community! Please share and let's simplify the way we deal with resources in .NET! /cc: @migueldeicaza.bsky.social, @scott.hanselman.com and other folks, I love to discuss this topic! You might disagree with my take! But its time to reconsider some old patterns.

Posted another episode on YouTube: "The way Dispose Pattern Should Be Implemented". It’s time to reconsider the Dispose Pattern and abandon Dispose(bool disposing) nonsense. Let’s move to a simpler approach and never mix managed and native resources. youtu.be/E6tQDczhrUM?...

Hey @davidfowl.com, @scott.hanselman.com, @jaredpar.bsky.social, @terrajobst.net and other #dotnet community members! Could you please share this tweet about how to unlock most of the C# productivity features even targeting .NET Framework or .netstandard2.0. Appreciate your support!

Posted another episode on YouTube: "Unlocking Modern C# Features Targeting .NET Framework". Quite a few devs limit themselves with C# 7.3 when they target full framework or .netstandard2.0. You still can leverage most of the latest C# features in this case. youtu.be/5eNtdj68qW4?...

How to Find Public Symbols That Can Be Internal Using Roslyn #dotnet #roslyn https://www.meziantou.net/how-to-find-public-symbols-that-can-be-internal-using-roslyn.htm?utm_medium=social&utm_source=bluesky

New in MSBuild Structured Log Viewer: Project Reference Graph New tab that shows the project graph layered by project "height". Each project only references projects above it. Clicking a project highlights all directly referenced projects above, and all projects below it that reference this one.

try ref12.io/net472

Hey friends, my YouTube channel is 18 YEARS OLD today! Please like and subscribe ;) youtube.com/shanselman

TIL about ValueTask.Preserve() helper method that returns a value task that may be used at any point in the future. ValueTasks are tricky and they can't be stored in a field, or awaited multiple times. Preserve "fixes" that by allocating Task<T> under the hood.

Hey #dotnet folks. Do you ever used (or needed) a debug version of a nuget package? The package has only the managed library, no native code, no executables. Is there a use case for that?

Hey #dotnet and other folks. Another quite exciting news: I've been mentoring colleges at MSFT for quite some time and now I'm available as a mentor at mentor.sh platform. Here is my profile: mentor.sh/mentors/Serg... Will be happy to be your mentor and learn from each other!