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Did you know? Ever wondered why C# uses the semicolon to terminate a statement? Obviously it comes from the C/C++ heritage it shares with other languages like Java, but where did C get it from? That would be Algol, where the semicolon was used to separate statements. 

But why the semicolon? In natural language grammar, the semicolon separates two independent but related clauses; it can also be used to separate items in a list (see what I did there?). And what is a program but a list of independent but related clauses?

(Bonus punctuation trivia: the comma is used to separate items in a list, just like the arguments in a function call. The period is used to end a complete thought, like a sentence or paragraph. How did Algol mark the end of a program unit? Why yes, with a period!)

Welcome to dotInsights by JetBrains! This newsletter is the home for recent .NET and software development related information.

🔗 Links

Here’s the latest from the developer community.

1. Nullable GUID Route Constraints in ASP.NET Core – Sebastian Nilsson
2. Closed class hierarchies: Exploring the .NET 11 preview – Part 4 – Andrew Lock
3. No more regressions with Snapshot Tests in C# using Verify: a practical guide – Davide Bellone
4. HttpClient Streaming in C#: HttpCompletionOption, ReadAsStreamAsync, and Server-Sent Events – Nick Cosentino
5. Building a Windows Tray App by combining Microsoft.UI.Reactor and a Worker Project – Morten Nielsen
6. Windows 11 can now run Linux containers with WSL Containers, no Docker Desktop needed (hands on) – Abhijith M B
7. Add vs AddRange in EF Core: The Performance Myth You Need to Stop Repeating – Chris Woodruff
8. Code review is theater now – John Bristowe
9. The .NET Host Process: What Runs Before Main() and Why It Sometimes Hangs – David McCarter
10. Worse is better: JSON versus XML – Mark Seemann
11. The best code is the one you shift+delete – Oren Eini
12. The Docker CLI Commands I Actually Use Every Day – James Joyner
13. Migrate Your WPF App to the Web, From Your Browser – XAML.io Team
14. How to Build a Dark Mode Toggle Without JavaScript – Jakub T. Jankiewicz
15. The role of ActivitySource in OpenTelemetry for .NET – Bart Wullems
16. Track every EF Core record change with temporal tables – David Grace
17. The Complete Guide to Tool Selection in AI Agents – Shittu Olumide
18. Coffee and Open Source Conversations – Jimmy Bogard – Isaac Levin
19. Available Now in .NET 11 for .NET MAUI – Leomaris Reyes
20. Multi-Tenancy Isn’t About Databases – Derek Comartin
21. Composition Ring Spinner [Avalonia] – Stefan Koell
22. C# Async/Await Made Simple – Lou Creemers
23. How to Log JSON Without Turning Your Terminal Into a Wall of Text – JavaScript Tools
24. What is a webhook? Endpoints, examples, and how they work – Jesse Sumrak
25. C# Tip: Use required members to prevent invalid object initialization (beware of SetsRequiredMembers attribute!) – Davide Bellone
26. You’re Already Using .NET’s ChangeToken (You Just Don’t Know It) – Khalid Abuhakmeh & Al Rodriguez
27. Zero-Code Validations in Your .NET API – Pavel Kalandra
28. A gentle introduction to Git worktrees – Nicholas C. Zakas
29. Stop Using Singletons in Unity | Game Systems Explained – Stacey Haffner
30. Guidelines for URL Storage and Comparison – Eric Lawrence
31. Dijkstra’s Shortest Path Algorithm – Kirupa Chinnathambi
32. TimeProvider and the End of Untestable DateTime.Now – Maarten Balliauw
33. Stop Accepting Breached Passwords: Integrating HaveIBeenPwned with Duende UserManagement – Al Rodriguez & Khalid Abuhakmeh
34. .NET Aspire: The price of forgetting WithReference – Bart Wullems

☕ Coffee Break

Take a break with something a little more fun.

DoomPaint – Doom using MS Paint as a playable display by leveraging clipboard and paste. Includes Doom shareware and plays with music and sound effects – Mark Russinovich. Don’t ask why. There is no why. It just is.

Yes, that’s a trailer for the Java Story in a .NET newsletter, but who doesn’t love a geeky bit of history, right?

200+ Funny Software Developer Puns and Jokes That Only Coders Will Truly Get – brace yourself

🗞️ JetBrains News

What’s going on at JetBrains? Check it out here:

• We’ve released the 2026.2 wave of dotUltimate tools – Rider 2026.2, with lots of goodies, including new skills and quality check hooks for agents, Hot Reload for WPF, TypeScript 7 support, improved game dev features for Unreal Engine and Godot. ReSharper 2026.2 gets Junie support, as part of our move to an open AI platform thanks to ACP. It also gets out of process mode enabled by default, so most of ReSharper runs outside of the Visual Studio process.
• ReSharper for Visual Studio Code 2026.2 was released, and now includes the #1 requested feature – debugging! As everyone knows, debugging is only half the story, so read Isaac’s first blog post detailing how ReSharper can help you write C# inside not just VS Code, but all other compatible editors (Cursor, Google Antigravity IDE, Devin Desktop, Kiro, and others). Check it out on the Marketplace or the OpenVSX Registry.
• We’ve announced our annual gamedev day for September 28. Make sure to save the date, and send us proposals for sessions!
• And finally, continuing our series of evaluating skills that claim to reduce token usage, we take a look at the Ponytail skill. Does it really reduce agent code by 54%? #QTWTAIN (You can also check out our evaluation of the rtk skill – does it really cut agent tokens by 60-90%? You might be able to guess from the hashtag…)

✉️ Comments? Questions? Send us an email. 

Trump’s FCC is developing a measure to bar US imports of new models of Chinese datacenter devices, sources say

The Trump administration is reportedly drafting a ban on US imports of new models of Chinese datacenter components, in the latest sign US authorities are scrambling to respond to the rapid development of AI technology in China.

Four people familiar with the matter told Reuters that the Federal Communications Commission (FCC), which oversees the US ⁠telecommunications industry, is developing a measure to bar imports of new ​Chinese optical transceivers, which allow data to travel over fiber-optic cables at the speed of light within datacenters. Officials hope to publish the measure this year, according to Reuters.

Luciana Berger says Joshua Bonehill-Paine should have no role in public life because of ‘his racism and his view of women’

A former MP has urged the Tory leader to drop an election candidate who was previously jailed for a campaign of antisemitic abuse against her.

Kemi Badenoch on Tuesday defended the Conservative party’s selection of Joshua Bonehill-Paine, a former neo-Nazi, insisting she believes in “second chances”.

Survey finds party members see health, the economy, cost of living and climate crisis among biggest challenges

Andy Burnham has inherited a Labour membership that is sceptical about increased welfare spending, supportive of higher defence spending, and ranks the climate crisis as one of the country’s biggest challenges, according to new polling.

The survey of 788 members between the end of June and the end of July shows them ranking health (43%), the economy (42%), cost of living (39%) and climate change (29%) as Britain’s most important issues, ahead of welfare benefits (7%) and immigration (6%).

Remains of 112 victims, including 40 children, recovered from rubble more than two years after residential block was destroyed

Mourners gathered in central Gaza on Tuesday for a mass funeral for 112 people, including 40 children, who were killed in 2023 in one of the deadliest Israeli strikes of the Gaza war.

Their bodies could not be recovered until now because of Israel’s continuing strikes, which have slowed, though not halted, since the ceasefire in October.

Migration commissioner says scheme regularising undocumented people ‘not a good signal’ for Europe

• Explainer: Why is Ceuta a migration flashpoint?

The EU’s top official on migration has criticised Spain’s plan to regularise undocumented migrants as “not a good signal” for Europe, after an emergency meeting intended to draw a line under divisions on the Ceuta crisis.

Magnus Brunner, the European commissioner for migration, said that while the EU could not currently see a direct link between events in Ceuta and Spain’s regularisation plan, the policy was “definitely not a good signal for the rest of Europe”.

BBC actor Sera Cracroft says if disgraced former newsreader had won it would be hurtful to abuse survivors

The disgraced former BBC presenter Huw Edwards has been criticised after entering a Welsh poetry competition under a pseudonym.

The actor Sera Cracroft, best known for her role in the long-running BBC Welsh language soap opera Pobol y Cwm, told the BBC it would have been “catastrophic” if Edwards had won the prize, and that the “image of him being crowned in front of the nation” would be “hurtful to survivors”.

Migration commissioner says scheme regularising undocumented people ‘not a good signal’ for Europe

• Explainer: Why is Ceuta a migration flashpoint?

The EU’s top official on migration has criticised Spain’s plan to regularise undocumented migrants as “not a good signal” for Europe, after an emergency meeting intended to draw a line under divisions on the Ceuta crisis.

Magnus Brunner, the European commissioner for migration, said that while the EU could not currently see a direct link between events in Ceuta and Spain’s regularisation plan, the policy was “definitely not a good signal for the rest of Europe”.

• ‘It has gone very well, getting to know the new coach’

• Brazil winger has one year left on contract at Bernabéu

Vinícius Júnior is settling into life under the new Real Madrid manager, José ⁠Mourinho, with a smile on his face even as uncertainty swirls around the Brazil forward’s future at the Bernabéu.

The 26-year-old, who has ⁠been ​one of the linchpins of Real Madrid’s attack in recent years, gave an upbeat assessment of his second ⁠day of pre-season training under Mourinho despite speculation linking him with a possible move to Arsenal.

Europe's heat wave exposes buried history and new threats — Nazi-era wrecks emerge from the Danube, nuclear reactors face cooling risks, and Greece battles deadly wildfires.

(Image credit: Darko Vojinovic)

Три месяца я строил одну и ту же контент-машину для AI/tech-канала тремя способами: вручную с ChatGPT, в n8n и на Python через Claude Code. В статье — архитектура из трёх пайплайнов, реальные тайминги из production-логов, миграция с SubMagic на собственный постпроцесс за один день и практический чек-лист, который поможет выбрать между ассистентом, визуальным конструктором и собственным ИИ-агентом.

Optimism echoes Trump’s claims on Monday that deal is close as mediators say they are exchanging proposals

• Middle East crisis live – latest updates

US and Qatari officials have said progress is being made in restoring a ceasefire in the US-Iran war and reopening the strait of Hormuz.

The optimistic speculation on Tuesday brought oil prices down 2%, but the strait remained closed to shipping and a cargo vessel was reportedly struck by an unidentified projectile off Oman’s coast close to the strait.

Часть 1

В управлении продуктом существуют, на мой взгляд, два полюса - функциональный и продуктовый подходы. В этом материале разберем, в чем разница подходов, как они работают и в чем их коренное отличие.

Привет, меня зовут Алексей Буренин, я работаю Product executive (CPO) и имею большой  опыт перестройки компаний на продуктовый подход и опыт работы в функциональном подходе. В данном материале я буду использовать не только свой многолетний опыт, но и опыт западных коллег и маститых авторов по менеджменту. Поехали!

Продуктовый подход как панацея от всех проблем - это довольно распространенное мнение: нам надо перейти на продуктовый подход, и тогда продукт и компания начнут расти. Или другой полюс - в нашей компании очень важно мнение 100500 стейкхолдеров, функции CEO которых надо учесть, и желания клиентов - одним словом, функциональный подход. Давайте посмотрим, в чем же реальная разница этих двух подходов. Первое, что следует заметить: оба подхода имеют право на существование, оба работают при настройке достаточно эффективно и результативно.

Очень распространенное и вредное заблуждение в продуктовой отрасли, о котором часто заявляют многие руководители, - что существует единственный верный способ или фреймворк, лучшая практика и прочее в разработке первоклассных продуктов. Важно понимать, что не существует единой системы, нет абсолютно верного или абсолютно неверного подхода, все зависит от контекста компании, окружения и множества факторов. Выбор продуктового или функционального подхода либо среднего между ними - это стратегический выбор компании.

Всем привет, Я Артур Валиев, Не хотелось но на этот раз я все-таки попрошу гуся что-бы помог рассказать мою историю.

Три дня назад я сидел и сравнивал integrity level токена процесса с integrity level окна в фокусе, чтобы понять, почему Диспетчер задач блокирует ввод удалённого пользователя. Никто в мире, кроме меня, в этот момент не знал, что это вообще проблема. Я был там один. И мне было хорошо.

Игровые движки не сравнивал только ленивый, но за анализом фич и красивых пресс-релизов редко упоминаются баги, костыли и прочие особенности, превращающие разработку в кошмар. А ведь именно они могут повлиять на игру сильнее, чем люмены, наниты и прочие URP.

Эта статья - сборник проблем Unity, с которыми столкнулся лично я. Он далеко не исчерпывающий и несколько субъективен, но знай я о них заранее - возможно выбрал бы другую технологию.

We would like to hear your experience of using peptides for therapeutic purposes

In recent years there has been a boom in interest in using peptides, from weight loss to anti-ageing and recovery from injury.

These include approved prescription weight-loss medications based on synthetic peptides that mimic natural hormones. However, sales of experimental and unregulated peptides are rising as online sellers tout them as part of a “wellness” regime.

Gianni Infantino’s reign as Fifa president is in severe peril after the collapse of his plans to sell off parts of the World Cup to private investment. Many Concacaf countries are considering following Europe’s lead by formally removing their support for the Fifa president, and there are widespread calls to remove him from his post. Lucy Hough speaks to columnist Jonathan Liew

Whether you’re nursing a joint, have an existing condition or just don’t feel like running, these exercises help get your cardio in

The runner’s high might be contagious. In 2024, the fitness tracking app Strava recorded a 59% increase in users attending social running events and run clubs globally. Applications for London’s marathon have increased 40% since 2024, while New York City’s received about 20% more applicants this year. Overall, an estimated 56 million Americans regularly run on a treadmill and 51 million jog, according to a report from the Sports and Fitness Industry Association.

But running has a reputation for being rough on our joints. There is some good news for those chasing the high: one 2023 study found little relationship between recreational running and arthritis of the hip or knee, and another suggests that the impact of running causes cartilage to adapt, fortify and thicken over time.