foreach (var worksheetCell in workSheet.Cells)
                {
                    if (worksheetCell.Value != null)
                    {
                        if (worksheetCell.Value.ToString() == "EMP 563")
                        {
                            var worksheetCellFullAddress = worksheetCell.Address;
                            Console.WriteLine(worksheetCellFullAddress);
                        }
                    }

                }