GdPicture.NET includes a powerful Thumbnail Viewer Component formerly called ThumbnailEx.
ThumbnailEx class is an embeddable control of the GdPicture.NET suite to display thumbnails from raster image, metafile and PDF documents.
It can be synchronized with a GdViewer object and generate thumbnails from a GdPicture Image, a GdPicturePDF objects or any folder.
Items can be individually added from files, stream or Bitmap.
Items can be moved, swapped, deleted or modified. Drag & drop between different ThumbnailEx controls or from the Windows Explorer is fully supported.