5 Answers, 1 is accepted
Thank you for the provided images.
To change the style of the selected pane you can extract and edit the default template of the RadPane. You can take a look at the Editing Control Templates help article which describes how you can get the default template of the controls.
Looking at the provided images, I can see that you are using different theme. I am assuming that you are using NoXAML binaries. Can you share which theme are you referencing in your project? Also, do you have a custom style for the panes? If yes, can you remove them and check again if this behavior is still reproducible?
Thanks for your answer。I have solved the problem。
I used XAML binaries and I referenced Office2016 in my project without a custom style for the panes.
I changed the XAML binaries to NoXAML binaries according to your answer，the problem was solved.