c# - Save filedialog not working -

bit of odd 1 here , i'm writing app gives save file option , save file dialog coded normal

savefiledialog ofd = new savefiledialog(); 

the dialog box comes no problem , clicking save doesn't throw errors no file saved , i'm not sure why , ideas ? i've googled , can't find similar problem

the savefiledialog class doesn't save anything, prompts user choose location , file name save file. job save file

this example extracted msdn link above explains concept

private void button1_click(object sender, system.eventargs e) {      stream mystream ;      savefiledialog savefiledialog1 = new savefiledialog();       savefiledialog1.filter = "txt files (*.txt)|*.txt|all files (*.*)|*.*"  ;      savefiledialog1.filterindex = 2 ;      savefiledialog1.restoredirectory = true ;       if(savefiledialog1.showdialog() == dialogresult.ok)      {          if((mystream = savefiledialog1.openfile()) != null)          {              // code write stream goes here.              mystream.close();          }      } }