Principal engineer at JetBrains, passionate about .NET, performance, and debugging. Microsoft MVP. Co-author of Pro .NET Memory Management (2nd edition)https://bsky.app/profile/kevingosse.nethttps://bsky.app/profile/kevingosse.net/post/3mplhg7cask2fI published part 10 of my "Writing a .NET Garbage Collector in C#" series: https://minidump.net/writing-a-net-gc-in-c-part-10/ This time, I implemented support for finalization, which reveals some intricacies of the .NET runtime.01 Jul 2026 11:53 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mplhg7cask2fhttps://bsky.app/profile/kevingosse.net/post/3mni23uswz22cDoes anybody know a way to monitor token usage in Copilot in Visual Studio? The github dashboard only shows the total, I would need the count per session.04 Jun 2026 16:27 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mni23uswz22chttps://bsky.app/profile/kevingosse.net/post/3mkpmis3fkc2xA coworker wrote a small tool to monitor the activity of Windows Defender. I recommend giving it a try. For instance I discovered that Defender was continuously scanning the activity of the Backblaze backup agent on my machine, wasting a lot of CPU time. I fixed it by adding a process exclusion.30 Apr 2026 12:29 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mkpmis3fkc2xhttps://bsky.app/profile/kevingosse.net/post/3mkkrjrn7q22eUp until now, I've always used PowerPoint for my talks: WYSIWYG, can get something decent just by dragging a few elements around. However it quickly becomes a nightmare when dealing with animations or complex layouts.28 Apr 2026 14:16 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mkkrjrn7q22ehttps://bsky.app/profile/kevingosse.net/post/3mj4wuy47sk2jI'm developing a bridge to allow agents to interact with my Windbg session. I tested it with an old dump, the agent ran a bunch of commands and immediately crashed Windbg. So now we're debugging Windbg.10 Apr 2026 08:49 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mj4wuy47sk2jhttps://bsky.app/profile/kevingosse.net/post/3mhvmchvdoc2dI'm still experimenting with exactly how to include it in my workflow, but Claude is so good at reverse engineering that it's really a game changer for advanced debugging. Everything is open-source if you're fluent in assembly code.25 Mar 2026 17:26 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mhvmchvdoc2dhttps://bsky.app/profile/kevingosse.net/post/3mhbt7utgk22hWhere does the .NET community live nowadays? Because apparently posting a technical article on reddit is considered self-promotion and forbidden except on Saturday. Honestly I'm speechless. [contains quote post or other embedded content]17 Mar 2026 20:36 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mhbt7utgk22hhttps://bsky.app/profile/kevingosse.net/post/3mhas5qnlfc23Have you ever noticed that a simple .NET Core applications on 64-bit uses more than 2TB of virtual memory? In a new episode of the series "writing a .NET garbage collector in C#", we discover the kind of problem that it intends to solve: https://minidump.net/writing-a-net-gc-in-c-part-9/17 Mar 2026 10:45 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mhas5qnlfc23https://bsky.app/profile/kevingosse.net/post/3mgu3xr6z5c2nI like Copilot CLI but the billing model stresses me out a little. Because there's no hourly or daily limit, I worry that I might run out of requests before the end of the month, and use them very conservatively. Then I end the month with a lot of unused quota. So I built a tool.12 Mar 2026 09:36 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mgu3xr6z5c2nhttps://bsky.app/profile/kevingosse.net/post/3mgkpsmf6nc25I'm trying GPT-5.4 and scratching my head when seeing the generated code. What reasoning process could lead to explicitly initializing to null a property, _and_ using the null-forgiving operator.08 Mar 2026 16:04 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mgkpsmf6nc25https://bsky.app/profile/kevingosse.net/post/3mgahepraxk2rClipPing got a major update! The tool displays a visual notification whenever the content of the clipboard changes, for all of you who are tired of ctrl+c not working. I added configurable overlays, and some QoL improvements (like automatically starting the tool with Windows).04 Mar 2026 14:06 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mgahepraxk2rhttps://bsky.app/profile/kevingosse.net/post/3mg5zwsrngk2nIt's crazy that Windows will post notifications for the most unsignificant stuff (like the unfamous "Windows Defender Antivirus did not find any threats"), but I had to check my event viewer for completely unrelated reasons to randomly discover that one of my HDDs is dying.03 Mar 2026 15:01 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mg5zwsrngk2nhttps://bsky.app/profile/kevingosse.net/post/3mg5ss76td22nI published part 8 of my "Writing a .NET Garbage Collector in C#" series. The subject this time is interior pointers: what are they, and why are they so challenging for the GC. https://minidump.net/writing-a-net-gc-in-c-part-8/03 Mar 2026 12:53 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mg5ss76td22nhttps://bsky.app/profile/kevingosse.net/post/3mfjzrbhkik2tI'm surprised that "dotnet tool install -g" uses the local nuget config, if any. For local tools, I get it. For global tools, I would expect it to always use the userprofile config. Sounds a bit dangerous? Like, if you run the command from your Downloads or temp folder and you have a leftover file.23 Feb 2026 16:04 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mfjzrbhkik2thttps://bsky.app/profile/kevingosse.net/post/3mff3vsqaik2kPro-tip: even if it's tempting, resist the urge to argue with copilot21 Feb 2026 16:59 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mff3vsqaik2khttps://bsky.app/profile/kevingosse.net/post/3mfc5dm5arc22I got "tricked" by PerfView when using it to measure the effectiveness of my optimizations, so I decided to write about it: https://minidump.net/an-unexpected-profiler-trap/ It's not specific to PerfView though, in theory this could happen with any profiler.20 Feb 2026 12:47 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mfc5dm5arc22https://bsky.app/profile/kevingosse.net/post/3meisd6bazc2bI published a new article in my "Writing a .NET GC in C#" series. This time, we implement a better storage for the handles, and we properly mark them during garbage collection. We also see why DependentHandles are annoying to deal with. https://minidump.net/writing-a-net-gc-in-c-part-7/10 Feb 2026 10:53 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3meisd6bazc2bhttps://bsky.app/profile/kevingosse.net/post/3mdfkau73rk2zAfter a long wait, I've finally published the sixth part in my "Writing a .NET Garbage Collector in C#" series. Today, we start implementing mark and sweep. https://minidump.net/writing-a-net-gc-in-c-part-6/27 Jan 2026 10:26 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mdfkau73rk2zhttps://bsky.app/profile/kevingosse.net/post/3mbbiuro22k2jIf you missed this video, I strongly recommend watching it. It's a great introduction to 3D graphics, short and easy to understand. I had a lot of fun reimplementing it in Winforms and text mode. [contains quote post or other embedded content]31 Dec 2025 09:00 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3mbbiuro22k2jhttps://bsky.app/profile/kevingosse.net/post/3ma7aa4pzes2xToday I ran into a deadlock in VS2026. I debugged it, and it turned out to be a common issue you may run into when writing a profiler. I wrote a short article about it: https://minidump.net/investigating-a-deadlock-in-visual-studio/17 Dec 2025 17:55 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3ma7aa4pzes2xhttps://bsky.app/profile/kevingosse.net/post/3ma6cnhdjqc2xVisual Studio 2026 18.1.1 has been released. I strongly recommend upgrading if you're using ReSharper, as it fixes an issue that was making startup significantly slower. Thanks a lot to the VS team for their reactivity!17 Dec 2025 09:05 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3ma6cnhdjqc2xhttps://bsky.app/profile/kevingosse.net/post/3m7p557sq7s2gI like the peace of mind that @backblaze.bsky.social is offering, especially after my recent SSD crash. But god, their support is beyond bad. I've contacted them twice, and both times I had to solve the issue myself after a completely unhelpful exchange.11 Dec 2025 08:17 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3m7p557sq7s2ghttps://bsky.app/profile/kevingosse.net/post/3m7hoeyfkts2nThere are Mondays, and then there are "the computer doesn't recognize the dev SSD anymore" Mondays. Samsung 990 Pro 2TB. I tried pretty much everything I could think of, including moving it to a different M2 slot. Suggestions are welcome. The drive doesn't appear in the bios.08 Dec 2025 09:04 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3m7hoeyfkts2nhttps://bsky.app/profile/kevingosse.net/post/3m6ykmh45ac27I was investigating a crash, and pasted my windbg output to ChatGPT to see if it could come up with any lead. It noticed something that I completely missed, a memory area that I dumped in binary was actually a string (even though it's not supposed to be). That's really nice and unexpected.02 Dec 2025 08:47 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3m6ykmh45ac27https://bsky.app/profile/kevingosse.net/post/3m5y3qus5b22wFocusing on the Rust Unwrap in the CloudFlare outage is really the scalability equivalent of "When a sage points to the moon, all the fool sees is the finger". At that scale, failures *will* happen. Programming error are unavoidable. What's interesting is why it took down the entire system.19 Nov 2025 10:56 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3m5y3qus5b22whttps://bsky.app/profile/kevingosse.net/post/3m4x5mllkps2qFun fact: you can't use print screen to capture a screenshot of a crash of SnippingTool06 Nov 2025 08:31 +0000at://did:plc:2lntbvb4qbb5q53kcctckd33/app.bsky.feed.post/3m4x5mllkps2q