private void ThumbnailsChanged()
{
if (AutoSize)
{
if (Thumbnails == null || Thumbnails.Count == 0)
{
Width = 0;
Height = 0;
}
else
{
var first = Thumbnails.Get(0).Thumbnail;
Width = first.PixelWidth;
Height = first.PixelHeight;
}
}
}
