WorksheetHidden Property

gets or sets whether the worksheet is hidden. If true, the worksheet is not listed in the worksheet tabs of the workbook.
If the worksheet is not part of a workbook, or the only one in the workbook, an exception will be thrown.
If the worksheet is the selected one, and attempted to set hidden, an exception will be thrown. Define another selected worksheet prior to this call, in this case.

public bool Hidden { get; set; }