One way or another, the change has to be made in the respective control's template. One of the options is to use Blend. On the other hand, if you use our implicitly styled themes
, you will be able to make inline changes in xaml, as you will have access to the default styles and templates that are available in separate ResourceDictionary files.
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.