Tooltip should adapt to dark mode?

Hello,

We match the design of apps like Visual Studio, VS Code, and Office.  All of those apps use light backgrounds for tooltips in dark themes.

You can always override the Brushes our themes generate if you wish.  The Resource Browser tab in our Theme Browser app lets you see all the generated resources like Brushes.  If you filter by "tooltip" you can see Brush keys like ToolTipBackgroundNormalBrushKey and can override them in your Application.Resources if you wish:

<SolidColorBrush x:Key="{x:Static themes:AssetResourceKeys.ToolTipBackgroundNormalBrushKey}" Color="Red" />