Excel range formatting Help in C#

try
            {
                object misValue = System.Reflection.Missing.Value;
                xlApp = new Excel.ApplicationClass();
                xlWorkBook = xlApp.Workbooks.Add(path);
                xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

                xlApp.DisplayAlerts = false;
                //Excel.Range excelCell = xlApp.get_Range("A1", "F10");
                Excel.Range excelCell = (Excel.Range)xlWorkSheet.get_Range("A1", "F10");
                excelCell.NumberFormat = "@";

                //Excel.Ranges excelCell1 = xlApp.get_Range("H1", "O10");
                Excel.Range excelCell1 = (Excel.Range)xlWorkSheet.get_Range("H1", "O10");
                excelCell1.NumberFormat = "@";

                //xlWorkBook.SaveAs(path, Excel.XlFileFormat.xlXMLSpreadsheet, misValue, misValue,
                //false, false, Excel.XlSaveAsAccessMode.xlExclusive,misValue, misValue, misValue, misValue, misValue);

                xlWorkBook.Save();
                xlWorkBook.Close(false, false, misValue);

                System.Runtime.InteropServices.Marshal.ReleaseComObject(xlWorkBook);
                System.Runtime.InteropServices.Marshal.ReleaseComObject(xlWorkSheet);
                System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);
            }
            catch (Exception ex)
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);
                System.Runtime.InteropServices.Marshal.ReleaseComObject(xlWorkBook);
                System.Runtime.InteropServices.Marshal.ReleaseComObject(xlWorkSheet);
                MessageBox.Show(ex.Message);
            }