Hi, I asked the same question on Avalonia's discussions, but I eventually found out that the issue was caused by Semi.Avalonia.

[IronEaterBeast]

I get unexpected results when trying to control the height of a NumericUpDown control.

The default size of the control is a bit too tall, so I tried using Height='25' to control its height. However, it didn't get smaller but was clipped instead. Is there any other way to control the height?

[rabbitism]

Which version are you using now?

[IronEaterBeast]

Hi, Avalonia 11.0.5, Semi.Avalonia 11.0.1

[rabbitism]

First of all you can use Small class, and you will get a 24 px high control.

If this is not what you want, for your version, you can locally (or globally) set a dynamic resource to decrease height

            <NumericUpDown.Resources>
                <x:Double x:Key="NumericUpDownWrapperDefaultHeight">24</x:Double>
            </NumericUpDown.Resources>

But I really doubt you globally added some padding to TextBox. you need to remove it if you have.

[IronEaterBeast]

Yeah, solved, thank you.

[rabbitism]

I know this is a bad design so we made some change in 11.1 beta. It's subject to change.

[IronEaterBeast]

Don't worry, Semi.Avalonia does a good job. Also, if I upgrade Semi but not Avalonia, will it cause any issues?

[rabbitism]

We have a compatibility table in readme. It will be updated accordingly. There will be certain breakpoints based on new feature introduces from upstream.