Please tell me how to get the groupbox back

[GLC-Kazetani]

Hi, Everyone.
Material Design is great, but I'd like to get the groupboxes back to Windows.
How do I get it back?

MaterialDesignGroupBox

            <Style x:Key="MaterialDesignGroupBox" TargetType="{x:Type GroupBox}">
                
            </Style>

[nicolaihenriksen]

@GLC-Kazetani If I understand you correctly, you are using Material Design for most parts, but want to opt-out of the GroupBox style?

That can be accomplished by setting the style to "null" directly on the GroupBox in this manner:

<GroupBox Style="{x:Null}">
  ...
</GroupBox>

If you want it application wide, you will want to "null" the style for the GroupBox type in your App.Xaml or similar.

[GLC-Kazetani]

Thank you for your reply!
I was able to run