![](dotnetdiagramimages/image570.png)
Visual Basic
C#
Managed Extensions for C++
C++/CLI
Thumbnail items do not load until they are initially displayed. When thumbnail items are initially displayed, the ImGearThumbnailList control asynchronously
loads and resizes the images using a System.ComponentModel.BackgroundWorker. The thumbnail image and marks are stored in a memory cache so they can be
quickly displayed again if scrolled out of view and back into view.
System.Object
System.Windows.Threading.DispatcherObject
System.Windows.DependencyObject
System.Windows.Media.Visual
System.Windows.UIElement
System.Windows.FrameworkElement
System.Windows.Controls.Control
System.Windows.Controls.ContentControl
System.Windows.Controls.ListBoxItem
ImageGear.Windows.Controls.ImGearThumbnailListItem