public static Cell XLGetCell(SpreadsheetDocument document, Sheet theSheet, string columnName, uint rowIndex)
{
WorkbookPart wbPart = document.WorkbookPart;
// Retrieve a reference to the worksheet part.
WorksheetPart wsPart = theSheet.XLPart(wbPart);
// Use its Worksheet property to get a reference to the cell
// whose address matches the address you supplied.
string addressName = columnName + rowIndex;
Cell theCell = wsPart.Worksheet.Descendants<Cell>().Where(c => c.CellReference == addressName).FirstOrDefault();
return theCell;
}
