|   | Name | Description | 
  | ActiveSheet | Returns the active sheet.   | 
  | ActiveWorksheet | Returns the active worksheet of the workbook, or null if the active sheet is not a worksheet.   | 
  | Colors | Returns an instance of IColors which represents the color palette associated with a workbook.   | 
  | Date1904 | Returns true if dates are represented as the number of days since 1/1/1904, false if dates are represented as the number of days since 12/31/1899.   | 
  | DisplayDrawingObjects | Gets or sets the option which specifies how drawing objects are to be displayed.   | 
  | FileFormat | Returns the file format which the workbook was last opened from or saved to. If the workbook has never been saved, the default file format is returned.   | 
  | FullName | Gets or sets the full name (including the path) of the workbook.   | 
  | IsModified | Gets or sets the property which specifies whether the workbook has been modified since it was created, opened or saved.   | 
  | Name | Returns the name (excluding the path) of the workbook.   | 
  | Names | Returns the collection of defined names in this workbook.   | 
  | PrecisionAsDisplayed | Gets or sets the property which determines whether numbers will be rounded to the precision of the number format.   | 
  | ProtectStructure | Gets or sets the property which determines whether the structure (number and order of worksheets) of a workbook may be changed.   | 
  | ProtectWindows | Gets or sets the property which determines whether the windows of a workbook are protected from changes.   | 
  | ReadOnlyRecommended | Gets or sets the property which determines whether read-only mode will be recommended to the user when the workbook is opened.   | 
  | SaveLinkValues | Gets or sets the property which determines whether externally referenced values will be saved with the workbook, enabling cells which refer to those values to be calculated without returning a #REF! error.   | 
  | Sheets | Returns an instance of ISheets which provides access to all sheets in this workbook.   | 
  | Styles | Returns an instance of IStyles which provides access to the named cell styles associated with this workbook.   | 
  | Theme | Returns an instance of ITheme which provides access to the theme associated with a workbook.   | 
  | UpdateLinks | Gets or sets the property which determines whether externally referenced values will be updated when a workbook is loaded by Excel. SpreadsheetGear supports reading, writing and modifying this value, but does not support automatically updating links unless the workbook is loaded into the same workbook set.   | 
  | WindowInfo | Returns an instance of IWorkbookWindowInfo which represents workbook specific window options.   | 
  | WorkbookSet | Returns the parent IWorkbookSet of this workbook.   | 
  | Worksheets | Returns an instance of IWorksheets which provides access to the worksheets in this workbook.   | 
  | WriteReserved | Returns true if the workbook was saved with this option.   | 
  | WriteReservedBy | Returns the name of the user who saved the workbook with the write reserved option.   |