You can load thumbnails by setting the ItemsSource property of the ImGearThumbnailList control to a collection of ImGearThumbnailPages, filename strings, Streams, ImGearDocuments, or ImGearPages in XAML or in code. The ImGearThumbnailPage class can be used to specify a Caption, PageNumber, and Source (filename string, Stream, ImGearDocument, or ImGearPage).
This section contains details on additional ways to load thumbnails and all pages of multi-page files: