You could repair the invalid file using the project from the attachment.
This item is declined because it is wrongly logged and the issue is duplicated with another feedback item. You may follow instead these feedback item which also provides a sample attached project for repairing such invalid files: https://feedback.telerik.com/Project/143/Feedback/Details/170586-pdfviewer-handle-documents-containing-invalid-cross-reference-table-start-index
Due to Silverlight limitations, currently only the user can specify which pages to be printed. We will consider implementing this custom functionality.
For now, the static methods of ExtensibilityManager class are the only option to extend all RadPdfViewer instances.
This item is declined because there are many PDF annotation types and we are going to create separate items for each type. You may follow some of the existing annotation feedback items listed below or create a new one which the Telerik team is going to approve. Here follows the list of the existing feedback items: https://feedback.telerik.com/Project/143/Feedback/Details/167439-pdfviewer-support-for-annotations-of-type-stamp https://feedback.telerik.com/Project/143/Feedback/Details/203379-pdfviewer-support-for-annotations-of-type-popup https://feedback.telerik.com/Project/143/Feedback/Details/199351-pdfviewer-support-for-freetext-annotation-type https://feedback.telerik.com/Project/143/Feedback/Details/149974-pdfviewer-highlight-annotation