First of all please excuse me for the delay of my answer. The needed behavior is achievable using the following approach:
1. Please use as many custom styles as line series in your application. For example in my test application I have three line series and that is why there are three custom styles: LineStyle1, LineStyle2, LineStyle3:
2. Set the custom styles to the series definitions (please check the code-behind)
3. On ChartArea_SelectionChanged set all line series except the one which is selected to be unselected. Our default behavior is to have unselected line series, when you first select it and then unselect it.
sender, ChartSelectionChangedEventArgs e)
(e.AddedSeries.Count == 0)
var otherseries =
I hope this helps.
All the best,
the Telerik team