In the nevron examples, I find the NDataPointDragTool to drag a data point, but I want to enable the user to drag some lines. For example, the user could click on the chart, which will generate a vertical line. And then I hope the user could drag this vertical line left and right to make some selection. How can I do it??

To make it clear, the way I add a vertical line is through _chart.Axis(StandardAxis.PrimaryX).ConstLines[0] . Is it possible to drag the const line?

Many thanks!