By default, the MinVisibleCount property is 8, which indicates that the control displays at least 8 slices, when it gets expanded. The Root.Items.Count property specifies the number of items that the control initially display when it gets expanded. The Add method, adds a new item to the control. The Clear method clears all items from the collection. The Item property accesses an item based on its index or name. The Remove method removes an item from the collection.