RadChart has been replaced by RadHtmlChart, Telerik's client-side charting component. If you are considering RadChart for new development, examine the RadHtmlChart documentation and online demos first to see if it will fit your development needs. If you are already using RadChart in your projects, you can migrate to RadHtmlChart by following these articles: Migrating Series, Migrating Axes, Migrating Date Axes, Migrating Databinding, Features parity. Support for RadChart is discontinued as of Q3 2014, but the control will remain in the assembly so it can still be used. We encourage you to use RadHtmlChart for new development.
The RadChart Skin property lets you apply a coordinated set of style changes to all the chart visual details at one time. The Skin tab of the wizard lets you visually inspect how a chart might look with a given skin.The skins displayed reflect the current chart type. In the screen shot below the chart type is Bubble.