使用ClosedXML,读取到空行

using ClosedXML.Excel;
...

int lastRow = workSheet.LastRowUsed().RowNumber();

                foreach (IXLRow row in workSheet.Rows(1,lastRow))
                                                 {    
                                                   foreach (IXLCell cell in row.Cells())
                                                                 {
                                                                      balabalabalabalabalabala...
                                                                 }
                                                 }