I’m having an issue trying to style a ToolTipModifier. Currently, I am populating my chart similar to your “500 series each with 500 points” example by using LineSeriesSource attached property. This works great for my scenario (tons of data), but as a result, I am not able to stylize my tooltip since all examples seem to be showing an attached property being used in XAML on the RenderableSeries.
Right now, I am simply just using a ToolTipModifier, which is working as expected. I’d perfer to re-style the tool tip via XAML, as our application is theme-able and we’d like to try and avoid code-behind has much as possible.