Gets or sets the display size of gallery items. Use this property along with the Gallery.ItemGlyphRegionSize property to enable gallery loading optimization.
A Size structure that specifies the display size of gallery items.
All gallery items have the same display size. If the ItemSize property is not set, the item display size will be calculated automatically, by iterating through all gallery items and locating the largest item.
See Gallery.ItemGlyphRegionSize to learn more.