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Sparkline lets you add a tooltip to provide some extra information in a pop-up box. The pop-up box appears every time you hover over the Sparkline. It can be used to display useful information about the data points used for plotting the sparkline.
To add a tooltip to the sparkline, add the following code.
xml
<c1:C1Sparkline.ToolTip>
<ToolTip>
Sparkline Type: Line
</ToolTip>
</c1:C1Sparkline.ToolTip>
csharp
sparkline.ToolTip = "Sparkline Type: Line";