_Application.Cells property

Returns a Range object that represents all the cells on the active worksheet. If the active document isn’t a worksheet, this property fails.

Namespace:  Microsoft.Office.Interop.Excel
Assembly:  Microsoft.Office.Interop.Excel (in Microsoft.Office.Interop.Excel.dll)

Range Cells { get; }

Because the Item property is the default property for the Range object, you can specify the row and column index immediately after the Cells keyword. For more information, see the Item property.