Telerik.Windows.Controls.SpreadsheetUI Helper methods for populating the collection of types of an object implementing the interface. Adds the primitive and collection types along with types that inherit and from this assembly to the collection. The ribbon of the RadSpreadsheet. Gets or sets the area that will contain the backstage. Gets or sets a value indicating whether the SpreadSheetRibbon is minimized. Gets or sets a value indicating whether the SpreadSheetRibbon is minimized. Gets or sets the area that will contain the backstage. Gets or sets the index of the currently selected tab of the ribbon. When overridden in a derived class, is invoked whenever application code or internal processes call . Raises the event. This method is invoked whenever is set to true internally. The that contains the event data.