System.Windows.Xps.Serialization.RCW.IXpsOMThumbnailGenerator.GenerateThumbnail(System.Windows.Xps.Serialization.RCW.IXpsOMPage, System.Windows.Xps.Serialization.RCW.XPS_IMAGE_TYPE, System.Windows.Xps.Serialization.RCW.XPS_THUMBNAIL_SIZE, System.Windows.Xps.Serialization.RCW.IOpcPartUri)