Adds an array of controls to the end of the collection. These controls must be objects of type RibbonButton, RibbonComboBox, RibbonLabel, RibbonListView, RibbonTextBox or RibbonSeperator.
[C#] public void AddRange(System.Windows.Forms.Control items);
[Visual Basic] Public Sub AddRange(ByVal items() As System.Windows.Forms.Control)
An array of controls to be added to the end of this collection.
If the RibbonItemCollection is optained by a HorizontalRibbonGroup controls are added to the group's first row.