Assembly: Microsoft.Office.Interop.Excel (in microsoft.office.interop.excel.dll)
Only 2-D line groups that contain at least two series can have up bars. This object isn’t a collection. There’s no object that represents a single up bar; you either have up bars turned on for all points in a chart group or you have them turned off.
Use the UpBars property to return the UpBars object.
If the HasUpDownBars property is False, most properties of the UpBars object are disabled.