public static string WriteDebugFile(Matrix mat, string filename, IXLWorkbook wb = null, List <Stream> streamsToClose = null, IFormatApplier formatApplier = null) { if (wb is null) { wb = new XLWorkbook(); } if (formatApplier is null) { formatApplier = new ClosedXmlFormatApplier(); } var rd = new ClosedXmlRenderer(wb, formatApplier); var targetFilename = TestUtils.GetFileName(filename); var fs = File.Create(targetFilename); if (streamsToClose != null) { streamsToClose.Add(fs); } rd.GenerateExcelFile(mat, fs); return(targetFilename); }