/// <summary>
/// Adds the specified item to the collection
/// </summary>
public new void Add(RibbonButton item)
{
CheckRestrictions(item);
item.SetOwner(Owner);
item.SetOwnerPanel(OwnerPanel);
item.SetOwnerTab(OwnerTab);
item.SetOwnerItem(OwnerList);
base.Add(item);
}