Found this code in this website still to save listbox data to an excel file. Please translate it into C# language.

Function tired_of_name_test()

Dim oExcel As Excel.Application                                                                         ' Excel Application
Set oExcel = New Excel.Application                                                                    ' Start it
oExcel.Workbooks.Open "YOUR_EXCEL_FILE.XLSX"                                       ' **** CHANGE NAME HERE **** Open it.

on error goto kill_task
Col = ListBox1.ColumnCount                                                         ' Number of Columns
Row = ListBox1.ListCount                                                              ' Number of Rows


For C = 1 to Ubound(Col)                                                              ' For each Column
    For L = 1 to Ubound(Row)                                                         ' in Each Line
         oExcel.Cells(j,i) = Listbox1.List(j - 1, i - 1)                             ' Write the value for Line, Columns
    next L                                                                                         ' Next Line
next C                                                                                            ' Next Col


       oExcel.ActiveWorkbook.Save                       ' Save
       oExcel.Workbooks(1).Close                         ' Close Workbook
       oExcel.Application.Quit                                 ' Close Application
exit function

kill_task:
      oExcel.ActiveWorkbook.Save                       ' Save
      oExcel.Workbooks(1).Close                         ' Close Workbook
      oExcel.Application.Quit                                 ' Close Application
end function