4 Aug 2025
2 mins
Application Insights, Azure, OpenTelemetry, SigNoz, Smart home
I have a small .NET application that manages some specific parts of my Software Defined House aka Smart home. Recently, I decided to transition from Application Insights and I found an unexpected behavior when using pure Open Telemetry exporter.
23 Jul 2025
1 mins
Homelab, Network, NTP, Time
Ever since I started building my homelab and started playing with networking I wanted to give something back. Something that’s a valuable service. And although I’m self-hosting a bunch of my websites and providing data from my weather stations publicly, it was not it. Until I stumbled upon timekeeping and time servers.
19 May 2025
1 mins
Presentations & Speaking
Next week Techorama in Antwerp is going to happen. And I’m looking forward to all-star sports edition. I was lucky and 2 of my sessions were selected.
16 May 2025
1 mins
.NET, C#
I was writing some code in EF Core’s codebase and saw different way of writing condition on nullable bool.
16 May 2025
1 mins
Presentations & Speaking
Příští týden se bude konat Gopas TechEd. Letos jsem připravil 3 přednášky.
6 Feb 2025
1 mins
.NET, C#, Databases in general, Entity Framework Core, Firebird, LINQ, SQL
I’m excited to announce the release of Entity Framework Core 9 provider for Firebird.
5 Nov 2024
2 mins
Azure, Cloud, Network
Purely out of curiosity I decided to test latencies to a few Azure datacenters around me. Specifically, Germany West Central (Frankfurt), Poland Central (Warsaw) and West Europe (Amsterdam). I wanted to test Azure DC in Austria as well, but it is not yet available.
6 Oct 2024
1 mins
Presentations & Speaking
In couple of days Techorama in Utrecht is going to happen. This year’s theme is funfair. This I was lucky and 2 of my sessions were selected.
13 Sep 2024
1 mins
Presentations & Speaking
We are couple of weeks from .NET DeveloperDays 2024. Really excited to be there. My main “show” there is going to be Mastering Entity Framework Core workshop.
2 Sep 2024
1 mins
Presentations & Speaking
Tento týden se koná, dneska už tradiční dvojboj konferencí, WUG Days 2024 a SQL Server Bootcamp 2024 v Brně. A tak jako obvykle, připravil jsem několik přednášek.
24 Jun 2024
1 mins
Presentations & Speaking
I’ll be speaking this Thursday about Tips and tricks for VS debugger in Vienna for DotNetDevs.at. You can register here.
3 Jun 2024
1 mins
Presentations & Speaking
One of my favourite conferences – .NET Developer Days – that happens in Warsaw in fall is now having also a Berlin edition. And I’m a big fan of Berliner Fernsehturm. Looks like a perfect combination (well, perfect combination would be to have the conference in Fernsehturm 😉). Anyway, I’ll have two sessions there and I hope to see you there.
23 May 2024
1 mins
.NET, C#, Databases in general, Entity Framework Core, Firebird, LINQ, SQL
I’m excited to announce the release of Entity Framework Core 8 provider for Firebird.
13 May 2024
4 mins
.NET, C#
I was working on a codebase the other day and it used heavily the pattern matching features of C#. And as I was writing string.IsNullOrEmpty
it got me thinking whether I could switch from this very specific method to using (maybe) a more general pattern matching approach. And also, how that compares in performance.
8 May 2024
1 mins
Kernel, Memory, Windows
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30 Apr 2024
1 mins
Presentations & Speaking
2.5.2024 od 17:00 na WUGu v Olomouci si popovídáme o async a await. Přednáška Async a await pěkně od podlahy má v mém reportoáru už asi 30 podob. Pokaždé když ji dělám řeknu něco jinak, někdo se zeptá na něco zajímavého atp. a ani tady to nebude jinak. Tak se přijďte podívat a udělat se mnou další podobu.
18 Apr 2024
1 mins
Presentations & Speaking
Zítra, 19. dubna, se koná globalní akce Global Azure 2024. I já přispěju trochu do mlýna s tématem Azure Spot instances as your secret weapon.
26 Mar 2024
1 mins
Presentations & Speaking
16.4.2024 od 17:30 na WUGu ve Zlíně si dáme dvojpřednášku. Laďte jak profík ve Visual Studiu a Práce se stringy v .NET 8 a SearchValues.
22 Mar 2024
1 mins
Presentations & Speaking
I’ll be speaking at this years Warsaw IT Days 2023. One sessions What’s new in C# 12 will be in-person in Warsaw, while other Dynamic PGO in .NET 8 and why you need to know about it is VoD.
1 Mar 2024
1 mins
Presentations & Speaking
V pondělí se uskuteční WUG Dev Day 2024. Připravil jsem dvě přednášky.
15 Feb 2024
2 mins
.NET, C#
My mind was wandering, as usual when it is not 100% occupied, and I remembered that the Select
LINQ function has an overload that gives you the index into the enumeration and it uses an int. So, I thought what’s going to happen if I have longer enumeration and it goes over the range of the int?
14 Feb 2024
1 mins
.NET, Firebird
Step forward for FbNetExternalEngine today – version 6.0 is ready, you can go and download it right now.
10 Nov 2023
1 mins
.NET, C#, Databases in general, Entity Framework, Entity Framework Core, Firebird, LINQ, SQL, Visual Studio
New major version 10.0.0.0 of ADO.NET provider for Firebird is ready for download.
9 Nov 2023
1 mins
Presentations & Speaking
Trhák letošního roku – .NET 8 – 14.11. v premiéře ve Zlíně s celebritami. Řečeno normálně, společné sledování keynote .NET Conf 2023 v rámci WUGu ve Zlíně, následná diskuze s experty a také neformální hospoda. Lepší úterní večer asi těžko vymyslíte (nebo nejste opravdový geek 😄). Tak doufám, že se tam uvidíme.
19 Oct 2023
2 mins
Presentations & Speaking
Less than a week until .NET Developer Days 2023. Can’t wait to be there. This year, I’ll be doing workshop and session.
24 Sep 2023
2 mins
Presentations & Speaking
After the Belgium version Techorama is going to Netherlands, in October 9-11.
I’ll deliver workshop called Mastering Entity Framework Core – basically in something like 8 hours I’ll try to teach you Entity Framework Core all the way into “monk” level. It will be a lot of stuff, but also lot of fun.
Besides the workshop, I’ll also have two sessions Autoincrement (identity) is not the only option for primary keys and What’s new in Entity Framework Core 7 (abstracts below).
23 Sep 2023
1 mins
Presentations & Speaking
Pokud to nemáte do Olomouce daleko, můžeme se ve středu 27.9.2023 od 17:00 potkat na WUGu v Olomouci s tématem Na co mám/můžu použít Roslyn.
10 Sep 2023
1 mins
Presentations & Speaking
Už zítra vypukne konference WUG Days 2023.2 a následovat bude SQL Server Bootcamp 2023. Protože čtete tento text, asi vás zajímá, jaké přednášky jsem připravil.
11 Aug 2023
1 mins
C#
I was today’s years old when I realized I can create class named end
in C#.
24 Jul 2023
1 mins
Presentations & Speaking
I’ll be at this year’s WeAreDevelopers World Congress. I’m running a workshop Writing and measuring high performance code with latest .NET and C# features.