RadPdfViewer does not preserve the text formatting when copying. Moreover, Silverlight does not have a rich text Clipboard so even if the formatting was preserved, it could not be used.
I hope this answers your question.
TRY TELERIK'S NEWEST PRODUCT - EQATEC APPLICATION ANALYTICS for SILVERLIGHT.
Learn what features your users use (or don't use) in your application. Know your audience. Target it better. Develop wisely.
Sign up for Free application insights >>