As I tried explaining earlier - you are confusing the two controls. There are no Appearance and Definition properties in the new ChartView, these exist somewhere in the old RadChart. You can check out the references I sent earlier and you will find many examples in which customization is demonstrated. You can also check out our online documentation - probably the styling section
is what you are looking for.
Check out Telerik Analytics, the service which allows developers to discover app usage patterns, analyze user data, log exceptions, solve problems and profile application performance at run time. Watch the videos
and start improving your app based on facts, not hunches.