Thank you for contacting Telerik Support.
Could you elaborate more on how do you use the Metro theme, do you set it in XAML or code behind? I was not able to reproduce the problem and unfortunately I am not quite sure what do you mean by: "The PDF Viewer control only works when I remove the richtextbox metro theme." What is the connections between RadPdfViewer control and the metro theme for RadRichTextBox in your application? We would appreciate it if you could send us sample code which demonstrates the problem.
Looking forward to your reply.
the Telerik team
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