c# - how to call method multiple time on button click -

i have code below allow me add data excel sheet directly sing given database, know how able call method multiple times add data 2 different excel file @ once, button calls method once clicked, using multi-threading.

private void addtodatabase() {     using (oledbconnection connection =                 new oledbconnection(excelconnectionstring))     {          connection.open();          checknumeberofsheets(connection);     } } 

button code;

private void button1_click(object sender, eventargs e) {     addtodatabase(); } 

may can pass string method addtodatabse like

   private void addtodatabase(string filename){     if(filename.equals("yourfirstfile"))      {       using (oledbconnection connection =             new oledbconnection(excelconnectionstring))             {                 connection.open();                 checknumeberofsheets(connection);              }       }     else if(filename.equals("yoursecondfile"))      {       using (oledbconnection connection =             new oledbconnection(excelconnectionstring2))             {                 connection.open();                 checknumeberofsheets(connection);              }       }     } 

and call this

    private void button1_click(object sender, eventargs e)     {          addtodatabase("yourfirstfile");          addtodatabase("yoursecondfile");     }