I have this problem with a tooltip in a datagrid( See picture )
But it's only then the row is selected ( See picture below )
Have can i change the the style in the datagrid to make the the Foreground Black then the row is selected.
Note that the white comes from the same resource as your highlighted first cell, so this will be affected as well.
Try this :
<DataGrid.Resources>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Orange"/>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}" Color="Black"/>
</DataGrid.Resources>