Virtual Classroom, the free self-paced technical training that gets you up to speed with Telerik and Kendo UI products quickly just got a fresh new look + new and improved content including a brand new Blazor course! Check it out at https://learn.telerik.com/.
FYI - If you mean a border around the entire chart, and not just the plot area, you can put the chart itself inside a RadBorder. For example:
<telerik:RadBorder BorderThickness="1" BorderColor="Blue" Padding="5"> <telerik:RadCartesianChart ... /> </telerik:RadBorder>