- 6/2/2025
- 2 minute read
Why is enumerating over List faster than IList?
If we have a List<T> and an IList<T>, enumerating over the List<T> is faster than enumerating over the IList<T>. Why is that?
Hey, I'm Steven a .NET Developer in Switzerland. I am a Microsoft MVP. Also, this blog is open source on GitHub.
Recent Posts
- 5/26/2025
- 2 minute read
Avoiding reflection in C# in way unsafer ways!
For good reasons, many folks don't want to use reflection. Since .NET 8, we have a better way of dealing with this in most of the cases (when known in advance). But we can go the opposite: Make it even unsafer for a tiny bit performance!
- 5/19/2025
- 2 minute read
Writing new guards with extensions in C# 14
In C# we have many nice guards sitting on top of static exceptions classes like ArgumentNullException, ArgumentOutOfRangeException, etc: As ArgumentException.ThrowIfNullOrEmpty, ArgumentException.ThrowIfNullOrWhiteSpace. Now we can extend them easily!
- 5/12/2025
- 2 minute read
Clearing NuGet Caches
NuGet can cache a lot of packages and other stuffs over time. Here a small rundown on how to clear the biggest chunk.
- 5/5/2025
- 1 minute read
Does .NET Documentation get ads? Aka: Is Copilot in the docs something useful?
The dotnet documentation gets hints about using GitHub Copilot. Is this an ad? And can we expect more in the future?
- 4/28/2025
- 5 minute read
HttpClient improvements in .NET 10
New dotnet version means new features and improvements. There is a nice update to the HttpClient class in .NET 10.
- 4/21/2025
- 3 minute read
Extensions get an update in .NET 10
With the latest preview: .NET 10 preview 3, we did get an overhaul on extensions. It might enable some nice tricks in the future.
- 4/14/2025
- 2 minute read
A custom 404 page in Blazor Web Apps
Sometimes you want to have a custom 404 page - and since .NET 8 and "Blazor WebApps" the <NotFound> tag of the Router doesn't work anymore, so let's create a custom page for that.
- 4/7/2025
- 2 minute read
More LinkedIn "Tips": Dragging your whole database into memory!
LinkedIn is never short on performance tips on .NET - And this time we drag the whole database towards the client, twice!
- 3/31/2025
- 2 minute read
C# Language Mind map v14
After some time, I updated my C# language mind map to the latest version: C# 14. Either as "poster" or clickable version!