Workbook.Extension Property
Gets a custom extension for this Workbook object.
Namespace: Microsoft.Office.Tools.Excel
Assembly: Microsoft.Office.Tools.Excel (in Microsoft.Office.Tools.Excel.dll)
Syntax
'Declaration
ReadOnly Property Extension As IWorkbookExtension
IWorkbookExtension Extension { get; }
Property Value
Type: Microsoft.Office.Tools.Excel.IWorkbookExtension
A custom extension for this Workbook object.
Remarks
A custom extension is an implementation of the IWorkbookExtension interface in an Excel solution that is created by using the Office development tools in Visual Studio. In document-level projects, this property returns an instance of the generated ThisWorkbook class by default. The ThisWorkbook class implements the IWorkbookExtension interface through the WorkbookBase class. For more information, see Programming Document-Level Customizations.
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.