| Name | Description | |
|---|---|---|
 | Add | Adds a new custom document property with the specified value (System.String, System.DateTime, System.Boolean, System.Int32 or System.Double) to a workbook and returns a reference to it. (Inherited from SpreadsheetGear.IDocumentProperties) |
| Clear | Removes all document properties from this collection. (Inherited from SpreadsheetGear.IDocumentProperties) |
| InitializeDefaults | Clears all built-in properties and then sets IBuiltinDocumentProperties.Author to the value of IWorkbookSet.UserName and sets IBuiltinDocumentProperties.CreationDate to System.DateTime.UtcNow. |