Public Overridable Function Open(ByVal fileName As String) As Workbook
{signature}
{parameters}
{param:fileName}The path and name of the file to open. The path can be relative or absolute. The file must be a OOXML format \(Excel 2007 or later\) .xlsx file or BIFF8 format \(Excel 97 or later\) .xls file.{param}
{returns}A [Workbook|Workbook] object representing the file opened.{returns}
{exceptions}
{exception:System.Exception}If the file cannot be found or opened, or if ExcelWriter cannot parse the file as a OOXML or BIFF8 file.{exception}
{remarks}ExcelWriter supports Excel's OOXML \(Excel 2007 or later\) and BIFF8 \(Excel 97 or later\) format only. Do not use this method to open BIFF7 \(Excel 95\) files.
{remarks}
{example}{code:csharp|title=C#} |