Fluent2 ToolTip Missing Some Lightweight Styling Resources Available in WinUI3

[robert-abeo]

Description

Fluent2's ToolTip is missing some lightweight styling resource that can be used to change common properties without re-templating. WPF just hardcodes these values. This is especially problematic for padding which is set across two different controls in the template instead of just one as per the standard.

Reproduction Steps

See current code with hard-coded values:

wpf/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Styles/ToolTip.xaml

Line 11 in cc2eee2

<Setter Property="MaxWidth" Value="260" />

wpf/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Styles/ToolTip.xaml

Line 30 in cc2eee2

Padding="8"

Expected behavior

WPF's Fluent2 implementation should follow upstream WinUI3 for ALL resources to ensure compatibility. This is a big task to review and align all the resource keys but I think it's needed.

See upstream:

https://github.com/microsoft/microsoft-ui-xaml/blob/aeed4c19e2fc7c2c093216a51b651f2f0890c930/src/controls/dev/CommonStyles/ToolTip_themeresources.xaml#L76-L77

Actual behavior

WPF's Fluent2 implementation has hardcoded values it shouldn't.

Regression?

No response

Known Workarounds

No response

Impact

No response

Configuration

No response

Other information

No response

[siagupta0202]

@robert-abeo the PR fixing this has already been merged via #9786. The changes should be available in .NET 9 itself.