How to hide column in excel sheet

Public Function setHeaderColumns(ByVal pck As ExcelPackage, ByVal columns As IEnumerable(Of ExcelEntity), ByVal WorksheetName As String) As ExcelPackage
            'create worksheet object
            Dim ws As ExcelWorksheet
            If (pck.Workbook.Worksheets.Count > 0) Then
                ws = pck.Workbook.Worksheets(WorksheetName)
            Else
                ws = pck.Workbook.Worksheets.Add(WorksheetName)
            End If
            Dim ColumnIndex As Integer = 1
            'set the name, color or hide the columns in excel
            For Each col As ExcelEntity In columns
                Dim excelColumn As ExcelColumn = ws.Column(ColumnIndex)
                ws.Column(ColumnIndex).Hidden = Not col.isActive

                'excelColumn.Hidden = Not col.isActive
                ws.Cells(1, ColumnIndex).Value = col.fieldText
                ws.Cells(1, ColumnIndex).Style.Font.Bold = True
                ws.Cells(1, ColumnIndex).Style.Font.Color.SetColor(Color.Black)
                If col.isRequired Then
                    ws.Cells(1, ColumnIndex).Style.Font.Color.SetColor(Color.Red)
                End If
                ws.Column(ColumnIndex).Width = 35
                ColumnIndex += 1
            Next
            Return pck
        End Function