public void WorksheetCreateFillTest() { MemoryStream stream = SpreadsheetReader.Create(); SpreadsheetDocument doc = SpreadsheetDocument.Open(stream, true); WorkbookStylesPart styles = SpreadsheetReader.GetWorkbookStyles(doc); SpreadsheetStyle defaultStyle = SpreadsheetReader.GetDefaultStyle(doc); uint index = SpreadsheetWriter.CreateFill(defaultStyle, styles); }